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Bug#846941: linux-image-4.8.0-1-amd64-unsigned: ThinkPad X220: hibernating with screen turned off (screensaver) causes it to remain off until reboot

From Ivan Krylov <krylov.r00t@gmail.com>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#846941: linux-image-4.8.0-1-amd64-unsigned: ThinkPad X220: hibernating with screen turned off (screensaver) causes it to remain off until reboot
Date 2016-12-09 12:40 +0100
Message-ID <sMrGV-2Gh-1@gated-at.bofh.it> (permalink)
References <sMrGV-2Gh-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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On 04.12.2016 17:02, Ivan Krylov wrote:
> Surprisingly, hibernate works with s2disk from uswsusp, but sometimes on resume system resets right after loading the image.

I had temporarily disabled screen power management in XScreenSaver and
have been hibernating via `echo disk > /sys/power/state` for a while.
After a few hibernate-resume cycles the system rebooted instead of
properly waking up after loading the image, so that's not uswsusp's bug.
However, it might deserve a separate bug report.

Also, the only reason s2disk doesn't cause the system to wake up with
screen disbaled is that it switches to another console before
snapshotting the system, forcibly turning the screen on.

-- 
Best regards,
Ivan

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Bug#846941: linux-image-4.8.0-1-amd64-unsigned: ThinkPad X220: hibernating with screen turned off (screensaver) causes it to remain off until reboot Ivan Krylov <krylov.r00t@gmail.com> - 2016-12-09 12:40 +0100

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