Bug#849224: xorg: Lots of graphical lockups

[Michel Dänzer <michel@daenzer.net>]

On 24/12/16 04:13 AM, Ryan Mattox wrote:
> Source: xorg
> Severity: important
> 
> Dear Maintainer,
> 
> As I was using my computer and setting up my second monitor, my display locked
> up and would only unlock when I went to a different tty and back to X. I
> eventually figured out compton was locking up my graphics, so I disabled it,
> but other programs such as games like supertuxkart and funguloids freeze up and
> playback from vlc also freezes up. Even simple things like glxgears freeze up.
> Chrome freezes up too, but firefox does not, even when playing fullscreen
> video.
> However, if I run games with the environment variable "vblank_mode=0", games
> work again, even chrome and compton works, but vlc still has troubles decoding
> video.
> Also I'm running the open source radeon driver with a AMD Radeon HD 6400M card
> if it matters.
> Anyway, thanks for putting in the time to look at my problem.

Could be bug #846779 . The following may serve as a workaround in
/etc/X11/xorg.conf:

Section "Device"
	Identifier "Device0"
	Option  "AccelMethod" "glamor"
	Option "DRI" "3"
EndSection


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer