linux-kernel - Re: [REGRESSION]: hibernate/sleep regression w/ bisection

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Date:	Wed, 2 Nov 2011 10:04:13 -0500
From:	Andrew Watts <akwatts@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	tj@...nel.org, rjw@...k.pl, airlied@...ux.ie
Subject: Re: [REGRESSION]: hibernate/sleep regression w/ bisection

On Tue, Nov 01, 2011 at 10:46:58PM -0700, Dmitry Torokhov wrote:
> 
> I am not sure how this commit could cause your "no video" issue...
> Are you hibernating from text console or X? Can you try plugging in USB
> keyboard and see if you are getting input? What about ssh into the box?
> 
> Thanks.
> 
> -- 
> Dmitry

Hi Dmitry et al.

Yes, I was hibernating from X. I do not have problems when I hibernate from
console.

I conducted the following exercise: a script runs a 20-hibernate loop that
saves dmesg output to individual files and pings my httpd server (on lo)
after every resume.

>From X, with the vanilla 2.6.39.4 kernel, I had 5 bad resumes out of 20
(the script continues though). My httpd server is pinged after all 20 
resumes and my dmesg is saved to a file. So, even after the bad resumes,
loopback networking and HD IO are functional.

The five problem resumes all have a similar warning in dmesg (see below).
I am copying Rafael Wysocki (since I can't seem to post to linux-pm@) 
and David Airlie (given the 'GPU lockup CP stall' message). [Please see 
thread https://lkml.org/lkml/2011/11/1/126 for complete history]

The same loop test conducted either a) from console or b) from X after
reversing commits 8ee294cd9def000 & 1d64b655dc083df encounters no problems
(all 20 resumes succeed) and there are no GPU lockup messages in my saved
dmesg output.

System specs:
P4 + ATI 9100IGP

~ Andy

PS. My messages do not arrive to linux-pm@...ts.linux-foundation.org. Does
    posting require subscription?

-----------------------------

[  243.626231] radeon 0000:01:05.0: GPU lockup CP stall for more than 82318msec
[  243.626236] ------------[ cut here ]------------
[  243.626252] WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:246 radeon_fence_wait+0x2c3/0x311()
[  243.626256] Hardware name: Pavilion zv5000
[  243.626259] GPU lockup (waiting for 0x00000F8C last fence id 0x00000F8A)
[  243.626262] Modules linked in: fan snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss fuse pl2303 snd_atiixp snd_ac97_codec ac97_bus snd_pcm pcmcia snd_timer snd ohci_hcd shpchp processor yenta_socket pcmcia_rsrc ssb video thermal wmi battery button ac ehci_hcd thermal_sys pcmcia_core firewire_ohci snd_page_alloc
[  243.626311] Pid: 1646, comm: X Tainted: G   M        2.6.39.4 #19
[  243.626314] Call Trace:
[  243.626325]  [<c1033164>] warn_slowpath_common+0x67/0x8e
[  243.626331]  [<c12c082a>] ? radeon_fence_wait+0x2c3/0x311
[  243.626335]  [<c12c082a>] ? radeon_fence_wait+0x2c3/0x311
[  243.626339]  [<c1033207>] warn_slowpath_fmt+0x2e/0x30
[  243.626344]  [<c12c082a>] radeon_fence_wait+0x2c3/0x311
[  243.626352]  [<c104b12a>] ? wake_up_bit+0x62/0x62
[  243.626358]  [<c12c0e37>] radeon_sync_obj_wait+0xc/0xe
[  243.626363]  [<c12908be>] ttm_bo_wait+0xa1/0x108
[  243.626371]  [<c12d6e7b>] radeon_gem_wait_idle_ioctl+0x76/0xc4
[  243.626378]  [<c127e62e>] drm_ioctl+0x1c2/0x42c
[  243.626383]  [<c12d6e05>] ? radeon_gem_set_tiling_ioctl+0x8e/0x8e
[  243.626389]  [<c109ad9a>] ? perf_pmu_enable+0x1a/0x21
[  243.626395]  [<c1026eed>] ? update_curr+0x164/0x24d
[  243.626403]  [<c11f5171>] ? rb_erase+0x16e/0x27a
[  243.626411]  [<c1007ba8>] ? __switch_to_xtra+0xf7/0x11d
[  243.626417]  [<c103015e>] ? set_next_entity+0xad/0xc1
[  243.626422]  [<c127e46c>] ? drm_version+0x8a/0x8a
[  243.626428]  [<c10e288e>] do_vfs_ioctl+0x79/0x54b
[  243.626436]  [<c158c95a>] ? schedule+0x29a/0x614
[  243.626441]  [<c10e2dcb>] sys_ioctl+0x6b/0x70
[  243.626446]  [<c1593813>] sysenter_do_call+0x12/0x22
[  243.626449] ---[ end trace 17a119d9361222c9 ]---
[  243.633615] radeon 0000:01:05.0: GPU reset succeed
[  243.671128] radeon 0000:01:05.0: WB disabled
[  243.671170] [drm] radeon: ring at 0x00000000D2001000
[  243.671189] [drm] ring test succeeded in 0 usecs
[  243.671200] [drm] ib test succeeded in 1 usecs
[  243.704033] ohci_hcd 0000:00:13.1: auto-stop root hub
[  243.704048] ohci_hcd 0000:00:13.0: auto-stop root hub

-----------------------------


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