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Date:	Sat, 26 Mar 2016 18:59:39 +0000
From:	Greg Stark <stark@....edu>
To:	linux-kernel@...r.kernel.org
Subject: Continue to get freezes on Chromebook PIxel

I continue to see freezes at random intervals on my Chromebook PIxel
(2013). The X UI freezes completely for anywhere from a fraction of a
second to several minutes but always eventually resumes. When it
resumes there's normally nothing in dmesg or any other logs and no
indication of exactly what exactly was happening when X was frozen.

I had always chalked this up to the known problems with the intel
graphics driver but apparently reports are that those problems are
fixed and nobody else continues to see these freezes.

I'm now suspecting that there's something else going on. Possibly the
Sandisk iSSD apparently other Sandisk SSDs are buggy as hell so maybe
the iSSD is as well? When the system returns there is usually a bunch
of processes in disk wait including dm_crypt and usually several
Chrome processes trying to page in stuff from swap. So blaming the SSD
doesn't seem entirely out of line. On the other hand *anything* that
locked up the PCI bus for a while would also cause lots of queued up
I/O.

I'm at a loss how to debug this. I'm looking for anything I can enable
that would indicate what is blocking X and/or the kernel. Presumably
there's some device driver waiting for some event for longer than is
reasonable and either holding some kernel lock or hardware resource.
Surely there are debug flags I can enable that will log whenever this
happens so I can see after a freeze what was waiting on what for so
long?


I do have logs from a particularly long freeze where the kernel logged
hung tasks. I suspect these just indicate what processes happened to
be have wanted to do during the freeze that caused them to get stuck,
not the culprit that actually caused them to get stuck. And I do have
the intel driver debug flags enable but I think all this shows is that
that the screensaver kicked in when the kernel finally unstuck and
scheduled X:

So please, if anyone has any suggestions of what tools to use or flags
to enable to get visibility into what the kernel is doing when
everything is frozen I would be more than happy to do further
investigation on this end.

Mar 26 17:06:52 pixel kernel: [174364.984072] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174364.984077]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174364.984078] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174364.984080] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174364.984088] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174364.984090]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174364.984092]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174364.984094]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174364.984096] Call Trace:
Mar 26 17:06:52 pixel kernel: [174364.984102]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174364.984104]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174364.984108]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174364.984111]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174364.984114]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174364.984115]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174364.984118]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174364.984121]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174364.984124]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174364.984126]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174364.984128]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174364.984130]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174364.984132]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174364.984135]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174364.984137]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174364.984139]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174364.984141]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174364.984144]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174364.984146]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174364.984148]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174364.984151]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174364.984153]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174364.984156]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174364.984158]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174484.987671] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174484.987676]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174484.987677] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174484.987679] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174484.987688] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174484.987690]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174484.987692]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174484.987694]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174484.987696] Call Trace:
Mar 26 17:06:52 pixel kernel: [174484.987702]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174484.987705]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174484.987709]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174484.987712]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174484.987714]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174484.987716]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174484.987718]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174484.987722]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174484.987724]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174484.987726]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174484.987728]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174484.987731]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174484.987733]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174484.987736]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174484.987738]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174484.987740]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174484.987742]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174484.987746]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174484.987747]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174484.987749]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174484.987752]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174484.987754]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174484.987757]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174484.987759]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174604.991268] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174604.991273]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174604.991274] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174604.991276] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174604.991284] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174604.991286]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174604.991289]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174604.991290]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174604.991292] Call Trace:
Mar 26 17:06:52 pixel kernel: [174604.991298]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174604.991300]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174604.991304]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174604.991308]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174604.991310]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174604.991312]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174604.991314]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174604.991317]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174604.991320]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174604.991322]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174604.991323]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174604.991326]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174604.991328]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174604.991332]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174604.991334]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174604.991336]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174604.991338]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174604.991341]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174604.991343]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174604.991345]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174604.991347]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174604.991350]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174604.991352]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174604.991355]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174724.994863] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174724.994868]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174724.994869] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174724.994870] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174724.994880] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174724.994882]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174724.994884]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174724.994885]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174724.994887] Call Trace:
Mar 26 17:06:52 pixel kernel: [174724.994893]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174724.994895]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174724.994899]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174724.994902]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174724.994904]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174724.994906]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174724.994909]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174724.994912]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174724.994915]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174724.994917]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174724.994919]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174724.994921]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174724.994923]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174724.994926]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174724.994928]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174724.994930]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174724.994932]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174724.994936]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174724.994938]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174724.994940]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174724.994942]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174724.994945]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174724.994948]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174724.994950]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174844.998452] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174844.998456]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174844.998457] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174844.998459] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174844.998467] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174844.998469]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174844.998471]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174844.998473]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174844.998475] Call Trace:
Mar 26 17:06:52 pixel kernel: [174844.998481]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174844.998483]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174844.998486]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174844.998490]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174844.998492]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174844.998494]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174844.998496]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174844.998499]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174844.998501]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174844.998503]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174844.998505]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174844.998507]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174844.998510]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174844.998513]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174844.998515]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174844.998517]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174844.998519]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174844.998522]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174844.998524]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174844.998526]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174844.998528]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174844.998530]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174844.998533]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174844.998535]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174965.002049] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [174965.002054]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [174965.002055] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [174965.002056] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [174965.002065] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [174965.002067]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [174965.002069]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [174965.002071]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [174965.002072] Call Trace:
Mar 26 17:06:52 pixel kernel: [174965.002078]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [174965.002081]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [174965.002084]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [174965.002088]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [174965.002090]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [174965.002092]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [174965.002094]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [174965.002097]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [174965.002100]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [174965.002102]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [174965.002104]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [174965.002106]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [174965.002108]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [174965.002111]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [174965.002113]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [174965.002115]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [174965.002117]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [174965.002121]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [174965.002123]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [174965.002124]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [174965.002127]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [174965.002129]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [174965.002132]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [174965.002134]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175085.005595] INFO: task
jbd2/dm-3-8:1693 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [175085.005601]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [175085.005602] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [175085.005605] jbd2/dm-3-8     D
0000000000000002     0  1693      2 0x00000000
Mar 26 17:06:52 pixel kernel: [175085.005609]  ffff880148916fc0
ffff8800930fa100 ffff8800a84a4000 ffff8800a84a3be0
Mar 26 17:06:52 pixel kernel: [175085.005611]  7fffffffffffffff
ffffffff815a8940 ffff8800a84a3c60 ffff8801281a9700
Mar 26 17:06:52 pixel kernel: [175085.005613]  ffffffff815a81a1
0000000000000000 ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [175085.005615] Call Trace:
Mar 26 17:06:52 pixel kernel: [175085.005622]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175085.005624]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [175085.005626]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [175085.005633]  [<ffffffffa01eec92>] ?
__split_and_process_bio+0x302/0x400 [dm_mod]
Mar 26 17:06:52 pixel kernel: [175085.005636]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175085.005637]  [<ffffffff815a77bd>] ?
io_schedule_timeout+0x9d/0x100
Mar 26 17:06:52 pixel kernel: [175085.005641]  [<ffffffff810b81b5>] ?
prepare_to_wait+0x55/0x80
Mar 26 17:06:52 pixel kernel: [175085.005642]  [<ffffffff815a8957>] ?
bit_wait_io+0x17/0x60
Mar 26 17:06:52 pixel kernel: [175085.005644]  [<ffffffff815a8518>] ?
__wait_on_bit+0x58/0x90
Mar 26 17:06:52 pixel kernel: [175085.005646]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175085.005647]  [<ffffffff815a85ce>] ?
out_of_line_wait_on_bit+0x7e/0xa0
Mar 26 17:06:52 pixel kernel: [175085.005649]  [<ffffffff810b8650>] ?
autoremove_wake_function+0x40/0x40
Mar 26 17:06:52 pixel kernel: [175085.005656]  [<ffffffffa020bed2>] ?
jbd2_journal_commit_transaction+0xf22/0x18a0 [jbd2]
Mar 26 17:06:52 pixel kernel: [175085.005659]  [<ffffffff810de4f9>] ?
try_to_del_timer_sync+0x59/0x80
Mar 26 17:06:52 pixel kernel: [175085.005663]  [<ffffffffa0210e12>] ?
kjournald2+0xc2/0x250 [jbd2]
Mar 26 17:06:52 pixel kernel: [175085.005666]  [<ffffffff810b8610>] ?
wake_atomic_t_function+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175085.005669]  [<ffffffffa0210d50>] ?
commit_timeout+0x10/0x10 [jbd2]
Mar 26 17:06:52 pixel kernel: [175085.005672]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [175085.005675]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175085.005677]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [175085.005679]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175085.005730] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [175085.005731]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [175085.005732] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [175085.005733] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [175085.005738] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [175085.005740]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [175085.005741]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [175085.005743]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [175085.005745] Call Trace:
Mar 26 17:06:52 pixel kernel: [175085.005747]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [175085.005749]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [175085.005752]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [175085.005755]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [175085.005758]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [175085.005759]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [175085.005761]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [175085.005764]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [175085.005767]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [175085.005769]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [175085.005771]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [175085.005773]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [175085.005775]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [175085.005778]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [175085.005780]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [175085.005782]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [175085.005784]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [175085.005786]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [175085.005788]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [175085.005790]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [175085.005792]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [175085.005795]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175085.005797]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [175085.005799]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175205.009185] INFO: task
jbd2/dm-3-8:1693 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [175205.009190]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [175205.009191] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [175205.009192] jbd2/dm-3-8     D
0000000000000002     0  1693      2 0x00000000
Mar 26 17:06:52 pixel kernel: [175205.009196]  ffff880148916fc0
ffff8800930fa100 ffff8800a84a4000 ffff8800a84a3be0
Mar 26 17:06:52 pixel kernel: [175205.009198]  7fffffffffffffff
ffffffff815a8940 ffff8800a84a3c60 ffff8801281a9700
Mar 26 17:06:52 pixel kernel: [175205.009200]  ffffffff815a81a1
0000000000000000 ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [175205.009202] Call Trace:
Mar 26 17:06:52 pixel kernel: [175205.009207]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175205.009209]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [175205.009212]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [175205.009219]  [<ffffffffa01eec92>] ?
__split_and_process_bio+0x302/0x400 [dm_mod]
Mar 26 17:06:52 pixel kernel: [175205.009221]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175205.009223]  [<ffffffff815a77bd>] ?
io_schedule_timeout+0x9d/0x100
Mar 26 17:06:52 pixel kernel: [175205.009226]  [<ffffffff810b81b5>] ?
prepare_to_wait+0x55/0x80
Mar 26 17:06:52 pixel kernel: [175205.009228]  [<ffffffff815a8957>] ?
bit_wait_io+0x17/0x60
Mar 26 17:06:52 pixel kernel: [175205.009229]  [<ffffffff815a8518>] ?
__wait_on_bit+0x58/0x90
Mar 26 17:06:52 pixel kernel: [175205.009231]  [<ffffffff815a8940>] ?
bit_wait+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175205.009233]  [<ffffffff815a85ce>] ?
out_of_line_wait_on_bit+0x7e/0xa0
Mar 26 17:06:52 pixel kernel: [175205.009235]  [<ffffffff810b8650>] ?
autoremove_wake_function+0x40/0x40
Mar 26 17:06:52 pixel kernel: [175205.009240]  [<ffffffffa020bed2>] ?
jbd2_journal_commit_transaction+0xf22/0x18a0 [jbd2]
Mar 26 17:06:52 pixel kernel: [175205.009244]  [<ffffffff810de4f9>] ?
try_to_del_timer_sync+0x59/0x80
Mar 26 17:06:52 pixel kernel: [175205.009248]  [<ffffffffa0210e12>] ?
kjournald2+0xc2/0x250 [jbd2]
Mar 26 17:06:52 pixel kernel: [175205.009251]  [<ffffffff810b8610>] ?
wake_atomic_t_function+0x60/0x60
Mar 26 17:06:52 pixel kernel: [175205.009254]  [<ffffffffa0210d50>] ?
commit_timeout+0x10/0x10 [jbd2]
Mar 26 17:06:52 pixel kernel: [175205.009257]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [175205.009260]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175205.009262]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [175205.009265]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175205.009314] INFO: task
kworker/0:2:15108 blocked for more than 120 seconds.
Mar 26 17:06:52 pixel kernel: [175205.009316]       Tainted: G
C      4.5.0-rc7-amd64 #1
Mar 26 17:06:52 pixel kernel: [175205.009317] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 26 17:06:52 pixel kernel: [175205.009318] kworker/0:2     D
0000000000000000     0 15108      2 0x00000000
Mar 26 17:06:52 pixel kernel: [175205.009323] Workqueue:
events_freezable thermal_zone_device_check
Mar 26 17:06:52 pixel kernel: [175205.009324]  ffff8801000e0240
ffff880060ab6f80 ffff88012b494000 ffff88012b493c50
Mar 26 17:06:52 pixel kernel: [175205.009326]  ffff88014a8035c0
ffff8801000e0240 ffff88014a89bb80 ffffffffa000e06d
Mar 26 17:06:52 pixel kernel: [175205.009328]  ffffffff815a81a1
7fffffffffffffff ffffffff815ab012 7fffffffffffffff
Mar 26 17:06:52 pixel kernel: [175205.009329] Call Trace:
Mar 26 17:06:52 pixel kernel: [175205.009332]  [<ffffffff815a81a1>] ?
schedule+0x31/0x80
Mar 26 17:06:52 pixel kernel: [175205.009334]  [<ffffffff815ab012>] ?
schedule_timeout+0x1b2/0x270
Mar 26 17:06:52 pixel kernel: [175205.009337]  [<ffffffff813a4410>] ?
acpi_ns_lookup+0x281/0x3a1
Mar 26 17:06:52 pixel kernel: [175205.009340]  [<ffffffff810bcbb1>] ?
down_timeout+0x31/0x50
Mar 26 17:06:52 pixel kernel: [175205.009342]  [<ffffffff815aa165>] ?
__down_timeout+0x75/0xc0
Mar 26 17:06:52 pixel kernel: [175205.009344]  [<ffffffff815ab000>] ?
schedule_timeout+0x1a0/0x270
Mar 26 17:06:52 pixel kernel: [175205.009346]  [<ffffffff810bcbc3>] ?
down_timeout+0x43/0x50
Mar 26 17:06:52 pixel kernel: [175205.009349]  [<ffffffff81383a26>] ?
acpi_os_wait_semaphore+0x48/0x62
Mar 26 17:06:52 pixel kernel: [175205.009351]  [<ffffffff813b0b4b>] ?
acpi_ut_acquire_mutex+0x44/0x7f
Mar 26 17:06:52 pixel kernel: [175205.009353]  [<ffffffff813a25ca>] ?
acpi_ex_enter_interpreter+0xc/0x29
Mar 26 17:06:52 pixel kernel: [175205.009355]  [<ffffffff813a534d>] ?
acpi_ns_evaluate+0x1b1/0x237
Mar 26 17:06:52 pixel kernel: [175205.009357]  [<ffffffff813a7d58>] ?
acpi_evaluate_object+0x13e/0x247
Mar 26 17:06:52 pixel kernel: [175205.009360]  [<ffffffff81383f03>] ?
acpi_evaluate_integer+0x52/0x87
Mar 26 17:06:52 pixel kernel: [175205.009362]  [<ffffffffa000c42a>] ?
acpi_thermal_get_temperature+0x47/0x77 [thermal]
Mar 26 17:06:52 pixel kernel: [175205.009364]  [<ffffffffa000c47d>] ?
thermal_get_temp+0x23/0x3a [thermal]
Mar 26 17:06:52 pixel kernel: [175205.009366]  [<ffffffff81469abf>] ?
thermal_zone_get_temp+0x4f/0x60
Mar 26 17:06:52 pixel kernel: [175205.009368]  [<ffffffff8146b398>] ?
thermal_zone_device_update.part.22+0x28/0x160
Mar 26 17:06:52 pixel kernel: [175205.009370]  [<ffffffff810909ba>] ?
process_one_work+0x15a/0x410
Mar 26 17:06:52 pixel kernel: [175205.009372]  [<ffffffff81090cbd>] ?
worker_thread+0x4d/0x480
Mar 26 17:06:52 pixel kernel: [175205.009374]  [<ffffffff81090c70>] ?
process_one_work+0x410/0x410
Mar 26 17:06:52 pixel kernel: [175205.009376]  [<ffffffff81096afd>] ?
kthread+0xcd/0xf0
Mar 26 17:06:52 pixel kernel: [175205.009378]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:06:52 pixel kernel: [175205.009380]  [<ffffffff815ac2cf>] ?
ret_from_fork+0x3f/0x70
Mar 26 17:06:52 pixel kernel: [175205.009383]  [<ffffffff81096a30>] ?
kthread_create_on_node+0x190/0x190
Mar 26 17:07:04 pixel kernel: [175679.231157]
[drm:connected_sink_compute_bpp] [CONNECTOR:34:eDP-1] checking for
sink bpp constrains
Mar 26 17:07:04 pixel kernel: [175679.231160]
[drm:connected_sink_compute_bpp] clamping display bpp (was 36) to EDID
reported max of 24
Mar 26 17:07:04 pixel kernel: [175679.231164]
[drm:intel_dp_compute_config] DP link computation with max lane count
4 max bw 270000 pixel clock 285250KHz
Mar 26 17:07:04 pixel kernel: [175679.231169]
[drm:intel_dp_compute_config] DP link bw 0a rate select 00 lane count
4 clock 270000 bpp 24
Mar 26 17:07:04 pixel kernel: [175679.231170]
[drm:intel_dp_compute_config] DP link bw required 684600 available
864000
Mar 26 17:07:04 pixel kernel: [175679.231172]
[drm:intel_modeset_pipe_config] hw max bpp: 36, pipe bpp: 24,
dithering: 0
Mar 26 17:07:04 pixel kernel: [175679.231175]
[drm:intel_dump_pipe_config] [CRTC:21][modeset] config
ffff880149f2e400 for pipe A
Mar 26 17:07:04 pixel kernel: [175679.231176]
[drm:intel_dump_pipe_config] cpu_transcoder: A
Mar 26 17:07:04 pixel kernel: [175679.231178]
[drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
Mar 26 17:07:04 pixel kernel: [175679.231179]
[drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n:
0, link_m: 0, link_n: 0, tu: 0
Mar 26 17:07:04 pixel kernel: [175679.231181]
[drm:intel_dump_pipe_config] dp: 1, lanes: 4, gmch_m: 6646806, gmch_n:
8388608, link_m: 553900, link_n: 524288, tu: 64
Mar 26 17:07:04 pixel kernel: [175679.231182]
[drm:intel_dump_pipe_config] dp: 1, lanes: 4, gmch_m2: 0, gmch_n2: 0,
link_m2: 0, link_n2: 0, tu2: 0
Mar 26 17:07:04 pixel kernel: [175679.231183]
[drm:intel_dump_pipe_config] audio: 0, infoframes: 0
Mar 26 17:07:04 pixel kernel: [175679.231184]
[drm:intel_dump_pipe_config] requested mode:
Mar 26 17:07:04 pixel kernel: [175679.231186]
[drm:drm_mode_debug_printmodeline] Modeline 0:"2560x1700" 60 285250
2560 2608 2640 2720 1700 1703 1713 1749 0x0 0xa
Mar 26 17:07:04 pixel kernel: [175679.231187]
[drm:intel_dump_pipe_config] adjusted mode:
Mar 26 17:07:04 pixel kernel: [175679.231189]
[drm:drm_mode_debug_printmodeline] Modeline 0:"2560x1700" 60 285250
2560 2608 2640 2720 1700 1703 1713 1749 0x48 0xa
Mar 26 17:07:04 pixel kernel: [175679.231191]
[drm:intel_dump_crtc_timings] crtc timings: 285250 2560 2608 2640 2720
1700 1703 1713 1749, type: 0x48 flags: 0xa
Mar 26 17:07:04 pixel kernel: [175679.231192]
[drm:intel_dump_pipe_config] port clock: 270000
Mar 26 17:07:04 pixel kernel: [175679.231193]
[drm:intel_dump_pipe_config] pipe src size: 2560x1700
Mar 26 17:07:04 pixel kernel: [175679.231194]
[drm:intel_dump_pipe_config] num_scalers: 0, scaler_users: 0x0,
scaler_id: 0
Mar 26 17:07:04 pixel kernel: [175679.231195]
[drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios:
0x00000000, lvds border: 0x00000000
Mar 26 17:07:04 pixel kernel: [175679.231196]
[drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size:
0x00000000, disabled
Mar 26 17:07:04 pixel kernel: [175679.231197]
[drm:intel_dump_pipe_config] ips: 0
Mar 26 17:07:04 pixel kernel: [175679.231198]
[drm:intel_dump_pipe_config] double wide: 0
Mar 26 17:07:04 pixel kernel: [175679.231200]
[drm:intel_dump_pipe_config] dpll_hw_state: dpll: 0x0, dpll_md: 0x0,
fp0: 0x0, fp1: 0x0
Mar 26 17:07:04 pixel kernel: [175679.231200]
[drm:intel_dump_pipe_config] planes on this crtc
Mar 26 17:07:04 pixel kernel: [175679.231202]
[drm:intel_dump_pipe_config] STANDARD PLANE:18 plane: 0.0 idx: 0
enabled
Mar 26 17:07:04 pixel kernel: [175679.231203]
[drm:intel_dump_pipe_config]      FB:47, fb = 2560x1700 format =
0x34325258<7>[175679.231205] [drm:intel_dump_pipe_config]
scaler:0 src (0, 0) 2560x1700 dst (0, 0) 2560x1700
Mar 26 17:07:04 pixel kernel: [175679.231206]
[drm:intel_dump_pipe_config] CURSOR PLANE:20 plane: 0.1 idx: 1 enabled
Mar 26 17:07:04 pixel kernel: [175679.231208]
[drm:intel_dump_pipe_config]      FB:82, fb = 64x64 format =
0x34325241<7>[175679.231209] [drm:intel_dump_pipe_config]    scaler:0
src (0, 0) 64x64 dst (830, 818) 64x64
Mar 26 17:07:04 pixel kernel: [175679.231211]
[drm:intel_dump_pipe_config] STANDARD PLANE:22 plane: 0.1 idx: 2
disabled, scaler_id = 0
Mar 26 17:07:04 pixel kernel: [175679.231252] [drm:edp_panel_vdd_on]
Turning eDP port A VDD on
Mar 26 17:07:04 pixel kernel: [175679.231258] [drm:edp_panel_vdd_on]
PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000f
Mar 26 17:07:04 pixel kernel: [175679.231260] [drm:intel_edp_backlight_off]
Mar 26 17:07:04 pixel kernel: [175679.431353]
[drm:intel_panel_actually_set_backlight] set backlight PWM = 0
Mar 26 17:07:04 pixel kernel: [175679.431515] [drm:edp_panel_off] Turn
eDP port A panel power off
Mar 26 17:07:04 pixel kernel: [175679.431518] [drm:wait_panel_off]
Wait for panel power off time

-- 
greg

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