Bug 54751

Summary:	Screen stays black after trying to wake up from suspend
Product:	Drivers	Reporter:	clime (clime7)
Component:	Video(DRI - Intel)	Assignee:	intel-gfx-bugs (intel-gfx-bugs)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	aaron.lu, daniel, intel-gfx-bugs
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.8.1	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	56331
Attachments:	Messages from the point when resume event occurred

Description clime 2013-03-04 13:04:26 UTC

If I suspend my computer, I can't wake it up again. There is some activity going on because I can see that my led icons for wifi and hdd light up. But screen stays black and I can only switch the computer off and on at this point. This does not happen with kernel 3.7.9. My computer is Toshiba Portege 11M. Please, let me know if you further information.

Comment 1 Aaron Lu 2013-03-05 03:00:37 UTC

Hi,

Please let me know what kernel version has this problem, v3.8?
And if possible, can you please ssh to your system after resume and attach the dmesg here? Thanks.

Comment 2 clime 2013-03-07 18:09:09 UTC

Created attachment 94741 [details]
Messages from the point when resume event occurred

Comment 3 clime 2013-03-07 18:10:54 UTC

It happens for 3.8.1. I don't know about 3.8.0 because my distribution (fedora) jumped from 3.7.9 to 3.8.1. Hopefully it will be possible to fix somehow.

Comment 4 Aaron Lu 2013-03-08 01:07:37 UTC

System resumed fine, looks like a drm graphics driver issue to me. Move it for graphics guys.

3.7.9 no problem, 3.8.1 has this problem: after resume, screen is blank.

Comment 5 Daniel Vetter 2013-03-11 17:28:28 UTC

Can you please retest with 3.9-rc2, just to exclude that it's not a duplicate with one of the recently fixed bugs?

Also please boot a broken kernel with drm.debug=0xe added to your kernel cmdline, reproduce the resume failure and attach the kernel log.

Finally a kernel bisect of this issue is always really helpful, my favourite guide is

http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/

Comment 6 clime 2013-04-09 10:15:58 UTC

It works already under kernel 3.8.3.

Comment 7 Daniel Vetter 2013-04-09 15:03:36 UTC

Thanks for reporting back and please reopen this bug if it breaks again.