Bug#440802: xserver-xorg-video-ati: DPMS + suspend/resume, display never recovers

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

joshua@nirmalvihar.info wrote:
> Package: xserver-xorg-video-ati
> Version: 1:6.6.3-2
> Severity: normal
>
> I have this device:
>
> 00:14.0 VGA compatible controller: ATI Technologies Inc Rage Mobility P/M (rev 64) (prog-if 00 [VGA])
>
> When I suspend/resume while DPMS is engaged then the X display refuses 
> to recover. It is still possible to switch to a different virtual 
> console (Ctl-Alt-F1) and that works. The virtual console is visible. X 
> can be restored by restarting the display manager.
>   

xserver-xorg-video-ati 6.6.3 is very old unfortunately. You should try
with the latest driver, xserver-xorg-video-ati 6.7.192 which is
currently in experimental. But you would have to upgrade
xserver-xorg-core to experimental too. If you're afraid of that, I have
rebuild 6.7.192 against unstable, the package is available from
http://people.debian.org/~bgoglin/ati-for-sid/

Also, after suspend/resume (once DPMS is engaged and X does not
recover), go to a virtual console and tell me what the following command
line says (dpms lines at the end of its output):
  $ DISPLAY=:0 xset q
Then try the following commands in case they help recovering:
  $ DISPLAY=:0 xset -dpms
  $ DISPLAY=:0 xset force dpms off

Brice