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Date: Fri, 5 Nov 2010 07:49:40 -0400 From: Sanjoy Mahajan <sanjoy@...n.edu> To: <linux-kernel@...r.kernel.org> Subject: S3 suspend failed freezing tasks (2.6.36, TP T60) I've had sporadic suspend-to-RAM (S3) failures running vanilla 2.6.36 (Thinkpad T60 with Intel graphics/wireless). One was a hard crash while suspending. The laptop just shut off in the middle of suspending, instead of going to sleep. Then it wouldn't reboot until I took out and replaced the battery (with the AC disconnected). The cause may have been that I disconnected AC power in the middle of the suspend; unfortunately, I haven't been able to reproduce that kind of crash. The most recent was a failure to suspend while freezing tasks. The first two times I suspended with my usual Fn-F4, which runs the /etc/acpi/sleep.sh and eventually the Debian/Redhat pm-suspend script. But I think it all ends up in "echo mem > /sys/power/state". As a check, I did a third suspend using just "echo mem > /sys/power/state", which also failed. To reboot, to get the laptop to respond to the power switch, I had to take out the battery and put it back (the AC power was not connected). The failure messages all begin: [94257.412148] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [94257.412211] emacs T 0000000a 0 3448 3446 0x00800004 Perhaps relevant: I had just upgraded emacs to the latest Debian unstable/testing version underneath the running emacs, and not restarted it. So, I was running the old emacs binary, but a new binary was on the filesystem. Here are the dmesgs from the three suspend attempts: /* here's the first suspend, with Fn-F4 */ [94237.357290] PM: Syncing filesystems ... done. [94237.396333] PM: Preparing system for mem sleep [94237.396438] Freezing user space processes ... [94257.412148] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [94257.412211] emacs T 0000000a 0 3448 3446 0x00800004 [94257.412226] f4ca4000 00200082 bfc7e65c 0000000a 00000000 00000000 00200006 c141c3c0 [94257.412246] c141c3c0 f4ca41a0 00feb000 c103a856 c141c3c0 f4ca41a0 f4ca41a4 f4ca4000 [94257.412265] c141c3c0 00000001 f4ca4000 00040005 f4ca4000 00000014 c103bf76 f598befc [94257.412283] Call Trace: [94257.412300] [<c103a856>] ? __dequeue_signal+0xa6/0xcd [94257.412311] [<c103bf76>] ? do_signal_stop+0xda/0x13c [94257.412322] [<c103c80a>] ? get_signal_to_deliver+0x27f/0x361 [94257.412334] [<c10027b6>] ? do_signal+0x56/0x6a1 [94257.412344] [<c103b62b>] ? group_send_sig_info+0x23/0x28 [94257.412356] [<c10c0fa2>] ? f_modown+0x26/0x61 [94257.412366] [<c10c0fa2>] ? f_modown+0x26/0x61 [94257.412376] [<c10c1015>] ? __f_setown+0x2b/0x33 [94257.412386] [<c10c1043>] ? f_setown+0x26/0x2b [94257.412396] [<c10c1277>] ? do_fcntl+0x22f/0x3b9 [94257.412406] [<c1002e21>] ? do_notify_resume+0x20/0x7f [94257.412419] [<c127d188>] ? work_notifysig+0x13/0x1b [94257.412443] hald-probe-vo D 00000086 0 16137 1342 0x00800004 [94257.412455] f4ca4840 00000086 00000000 00000086 00000000 00000000 f69f0074 c141c3c0 [94257.412473] c141c3c0 f4ca49e0 00feb000 00000086 c141c3c0 f4ca49e0 f4ca49e4 f4ca4840 [94257.412492] c141c3c0 00000001 f4ca4840 c24073c0 c20d0f94 f4f61e60 c127bcf2 f4f61e58 [94257.412511] Call Trace: [94257.412520] [<c127bcf2>] ? io_schedule+0x57/0x8f [94257.412531] [<c1089de6>] ? sync_page+0x39/0x3c [94257.412541] [<c1089dee>] ? sync_page_killable+0x5/0x27 [94257.412552] [<c127c07e>] ? __wait_on_bit_lock+0x2f/0x68 [94257.412562] [<c1089de9>] ? sync_page_killable+0x0/0x27 [94257.412573] [<c1089d2d>] ? __lock_page_killable+0x6f/0x75 [94257.412584] [<c104370b>] ? wake_bit_function+0x0/0x30 [94257.412595] [<c108ad9f>] ? generic_file_aio_read+0x421/0x5d6 [94257.412608] [<c10b7155>] ? do_sync_read+0x9e/0xd3 [94257.412620] [<c109de11>] ? __do_fault+0x39e/0x3cb [94257.412632] [<c1108420>] ? fsnotify_perm+0x3c/0x45 [94257.412643] [<c10b7223>] ? rw_verify_area+0x99/0xba [94257.412653] [<c10b70b7>] ? do_sync_read+0x0/0xd3 [94257.412663] [<c10b775c>] ? vfs_read+0x7c/0xd6 [94257.412673] [<c113ea1e>] ? copy_to_user+0x2c/0x100 [94257.412683] [<c10b7849>] ? sys_read+0x3c/0x60 [94257.412693] [<c1002f1f>] ? sysenter_do_call+0x12/0x28 [94257.412705] [94257.412709] Restarting tasks ... done. [94257.419009] video LNXVIDEO:00: Restoring backlight state /* attempt number 2 (with Fn-F4 again): */ [94313.358681] PM: Syncing filesystems ... done. [94313.385268] PM: Preparing system for mem sleep [94313.385374] Freezing user space processes ... [94333.400206] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [94333.400271] emacs T 0000000a 0 3448 3446 0x00800004 [94333.400286] f4ca4000 00200082 bfc7e65c 0000000a 00000000 00000000 00200006 c141c3c0 [94333.400306] c141c3c0 f4ca41a0 00feb000 c103a856 c141c3c0 f4ca41a0 f4ca41a4 f4ca4000 [94333.400324] c141c3c0 00000001 f4ca4000 00040005 f4ca4000 00000014 c103bf76 f598befc [94333.400343] Call Trace: [94333.400359] [<c103a856>] ? __dequeue_signal+0xa6/0xcd [94333.400371] [<c103bf76>] ? do_signal_stop+0xda/0x13c [94333.400381] [<c103c80a>] ? get_signal_to_deliver+0x27f/0x361 [94333.400393] [<c10027b6>] ? do_signal+0x56/0x6a1 [94333.400403] [<c103b62b>] ? group_send_sig_info+0x23/0x28 [94333.400416] [<c10c0fa2>] ? f_modown+0x26/0x61 [94333.400426] [<c10c0fa2>] ? f_modown+0x26/0x61 [94333.400436] [<c10c1015>] ? __f_setown+0x2b/0x33 [94333.400446] [<c10c1043>] ? f_setown+0x26/0x2b [94333.400456] [<c10c1277>] ? do_fcntl+0x22f/0x3b9 [94333.400466] [<c1002e21>] ? do_notify_resume+0x20/0x7f [94333.400479] [<c127d188>] ? work_notifysig+0x13/0x1b [94333.400501] hald-probe-vo D 00000086 0 16137 1342 0x00800004 [94333.400514] f4ca4840 00000086 00000000 00000086 00000000 00000000 f69f0074 c141c3c0 [94333.400532] c141c3c0 f4ca49e0 00feb000 00000086 c141c3c0 f4ca49e0 f4ca49e4 f4ca4840 [94333.400551] c141c3c0 00000001 f4ca4840 c24073c0 c20d0f94 f4f61e60 c127bcf2 f4f61e58 [94333.400570] Call Trace: [94333.400579] [<c127bcf2>] ? io_schedule+0x57/0x8f [94333.400590] [<c1089de6>] ? sync_page+0x39/0x3c [94333.400600] [<c1089dee>] ? sync_page_killable+0x5/0x27 [94333.400611] [<c127c07e>] ? __wait_on_bit_lock+0x2f/0x68 [94333.400621] [<c1089de9>] ? sync_page_killable+0x0/0x27 [94333.400632] [<c1089d2d>] ? __lock_page_killable+0x6f/0x75 [94333.400643] [<c104370b>] ? wake_bit_function+0x0/0x30 [94333.400654] [<c108ad9f>] ? generic_file_aio_read+0x421/0x5d6 [94333.400667] [<c10b7155>] ? do_sync_read+0x9e/0xd3 [94333.400678] [<c109de11>] ? __do_fault+0x39e/0x3cb [94333.400691] [<c1108420>] ? fsnotify_perm+0x3c/0x45 [94333.400701] [<c10b7223>] ? rw_verify_area+0x99/0xba [94333.400711] [<c10b70b7>] ? do_sync_read+0x0/0xd3 [94333.400721] [<c10b775c>] ? vfs_read+0x7c/0xd6 [94333.400732] [<c113ea1e>] ? copy_to_user+0x2c/0x100 [94333.400742] [<c10b7849>] ? sys_read+0x3c/0x60 [94333.400751] [<c1002f1f>] ? sysenter_do_call+0x12/0x28 [94333.400765] [94333.400769] Restarting tasks ... done. [94333.413420] video LNXVIDEO:00: Restoring backlight state /* attempt number 3, using "echo mem > /sys/power/state" directly: */ [94365.444481] PM: Syncing filesystems ... done. [94365.465514] PM: Preparing system for mem sleep lient 1417[0:0] has disconnected [94365.518984] Freezing user space processes ... [94385.534181] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [94385.536308] emacs T 0000000a 0 3448 3446 0x00800004 [94385.538367] f4ca4000 00200082 bfc7e65c 0000000a 00000000 00000000 00200006 c141c3c0 [94385.540527] c141c3c0 f4ca41a0 00feb000 c103a856 c141c3c0 f4ca41a0 f4ca41a4 f4ca4000 [94385.542701] c141c3c0 00000001 f4ca4000 00040005 f4ca4000 00000014 c103bf76 f598befc [94385.544903] Call Trace: [94385.547023] [<c103a856>] ? __dequeue_signal+0xa6/0xcd [94385.549227] [<c103bf76>] ? do_signal_stop+0xda/0x13c [94385.551440] [<c103c80a>] ? get_signal_to_deliver+0x27f/0x361 [94385.553711] [<c10027b6>] ? do_signal+0x56/0x6a1 [94385.555997] [<c103b62b>] ? group_send_sig_info+0x23/0x28 [94385.558309] [<c10c0fa2>] ? f_modown+0x26/0x61 [94385.560599] [<c10c0fa2>] ? f_modown+0x26/0x61 [94385.562838] [<c10c1015>] ? __f_setown+0x2b/0x33 [94385.565061] [<c10c1043>] ? f_setown+0x26/0x2b [94385.567234] [<c10c1277>] ? do_fcntl+0x22f/0x3b9 [94385.569417] [<c1002e21>] ? do_notify_resume+0x20/0x7f [94385.571570] [<c127d188>] ? work_notifysig+0x13/0x1b [94385.573716] hald-probe-vo D 00000086 0 16137 1342 0x00800004 [94385.575904] f4ca4840 00000086 00000000 00000086 00000000 00000000 f69f0074 c141c3c0 [94385.578243] c141c3c0 f4ca49e0 00feb000 00000086 c141c3c0 f4ca49e0 f4ca49e4 f4ca4840 [94385.580559] c141c3c0 00000001 f4ca4840 c24073c0 c20d0f94 f4f61e60 c127bcf2 f4f61e58 [94385.582884] Call Trace: [94385.585098] [<c127bcf2>] ? io_schedule+0x57/0x8f [94385.587347] [<c1089de6>] ? sync_page+0x39/0x3c [94385.589593] [<c1089dee>] ? sync_page_killable+0x5/0x27 [94385.591826] [<c127c07e>] ? __wait_on_bit_lock+0x2f/0x68 [94385.594070] [<c1089de9>] ? sync_page_killable+0x0/0x27 [94385.596317] [<c1089d2d>] ? __lock_page_killable+0x6f/0x75 [94385.598583] [<c104370b>] ? wake_bit_function+0x0/0x30 [94385.600849] [<c108ad9f>] ? generic_file_aio_read+0x421/0x5d6 [94385.603120] [<c10b7155>] ? do_sync_read+0x9e/0xd3 [94385.605375] [<c109de11>] ? __do_fault+0x39e/0x3cb [94385.607626] [<c1108420>] ? fsnotify_perm+0x3c/0x45 [94385.609865] [<c10b7223>] ? rw_verify_area+0x99/0xba [94385.612082] [<c10b70b7>] ? do_sync_read+0x0/0xd3 [94385.614274] [<c10b775c>] ? vfs_read+0x7c/0xd6 [94385.616446] [<c113ea1e>] ? copy_to_user+0x2c/0x100 [94385.618635] [<c10b7849>] ? sys_read+0x3c/0x60 [94385.620872] [<c1002f1f>] ? sysenter_do_call+0x12/0x28 [94385.623134] [94385.625405] Restarting tasks ... done. [94385.634492] video LNXVIDEO:00: Restoring backlight state -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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