[Bug 66741] suspend to disk(hibernate) resumes the first time but black screen on the second time

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=66741

b3nmore at googlemail.com changed:

           What    |Removed                     |Added
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                 CC|                            |b3nmore at googlemail.com

--- Comment #2 from b3nmore at googlemail.com ---
I'm having the same issue on a i5-4570S and dmesg shows the same two warnings
as in the attached dmesg.output (encoder's hw state doesn't match sw tracking
(expected 1, found 0); crtc's computed active state doesn't match tracked
active state (expected 1, found 0)). So I believe I'm seeing the same issue and
can fill in some details.

I'm trying to summarize what I've found out so far. The full history can be
found at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1250498 . Note,
that I need to set /sys/power/disk to [shutdown] to get a consistent behavior
(but this may be another issue).

Starting with (ubuntu mainline) kernel version 3.10-rc1, resume from S4 only
works correctly once. The second time the monitor goes into powersave mode, but
ssh is still possible. dmesg shows the two mentioned warnings at
drivers/gpu/drm/i915/intel_display.c.
Kernel 3.9.11 does not have this issue, so I guess it's a regression. A full
commit bisect showed, that 5aa1c98862d3f365d9cf6d0833d5dc127d2a76e7 is the
first bad commit (I did this however with /sys/power/disk=[platform], but I
think the result should be valid even so).

The latest mainline kernel I've tested and failed was 3.13-rc6.

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