[Bug 86565] black screen after resume from hibernation since linux kernel 3.18

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86565

--- Comment #1 from Martin Steigerwald <Martin at Lichtvoll.de> ---
I wonder whether

Bug 80773 - [hsw backlight bisected] backlight is off after resume

with this fixing commit

sna/transform: Correctly check for imprecise fractional translations
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=7ecc778691c452285f754743a93a46fa1d3da52f

may be related to it. But its a driver fix in X.org, yet for me working is
kernel 3.17 and not working is kernel 3.18. So might be something different.

I can also try changing sleep modules to userspace software suspend… maybe I
can tell it to switch to VT1 before hibernation this way so I may see some
kernel debug messages.

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