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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] Occasional display hang on DPMS resume"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105571#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] Occasional display hang on DPMS resume"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105571">bug 105571</a>
from <span class="vcard"><a class="email" href="mailto:freedesktop-bugs@PaulSD.com" title="Paul Donohue <freedesktop-bugs@PaulSD.com>"> <span class="fn">Paul Donohue</span></a>
</span></b>
<pre>This happened again today.
Laptop was last booted on 04/01/2018. I was working on my laptop on battery
(last time this happened it was on A/C power), closed my laptop lid, opened it
again about a minute later, the backlight did not immediately come on like it
usually does, the backlight came on after a few seconds, but the screen
remained black after the backlight came on. I closed and re-opened the lid
again, and the backlight turned off and never came back on.
I plugged in an external monitor and managed to enable it, and everything seems
to be working fine on that external monitor.
Same kernel and DMC as before: kernel 4.13.0-37-generic, DMC 1.26
Stack trace in dmesg looks the same as before (I will attach it). Xorg.0.log
has nothing interesting in it. /sys/class/drm/card0/error says "No error state
collected". xrandr says "xrandr: Output eDP1 is not disconnected but has no
modes". xrandr --verbose says the eDP1 backlight is on, but it definitely is
not. The brightness buttons on the keyboard don't seem to do anything.</pre>
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