Bug#661112: i915: Resume from suspend does not fully turn on laptop screen (*ERROR* failed to train DP, aborting)

[Jonathan Nieder <jrnieder@gmail.com>]

Didier Raboud wrote:
> Le vendredi, 24 février 2012 10.41:45, Enrico Zini a écrit :

>> since version 3.2.0, when I resume from suspend the laptop screen
>> backlight turns on, but the screen contents remain all black. Other
>> monitors connected to the system wake up fine.
>
> I'm getting the same symptoms, but with a different syslog error:
>
> [18889.928026] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung

New bug, please.

Thanks,
Jonathan