[3.4-rc1][Regression][intel] Resume from suspend to disk hangs on restoring backlight state

[Maciej Rutecki]

Last known good: 3.3
Bad kernel: 3.4-rc1
Subsystem: power management/suspend/dri(intel)

When I resume from suspend to disk then system hangs on this screen:
http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/DSC_5479.jpg

It does not help SysRq keys. Only I can force power off by hold power button.

Dmesg:
http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/dmesg-3.4-rc1.txt

Config:
http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/config-3.4.0-rc1
-- 
Maciej Rutecki
http://www.mrutecki.pl