[Bug 66741] suspend to disk(hibernate) resumes the first time but black screen on the second time
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Tue Jan 7 12:35:09 PST 2014
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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