[ltp] System hang when viewing videos

[Phil Shotton]

I pulled the latest xf86-video-ati and drm, built and installed. Now my 
second monitor goes blank when I do:

    xrandr --output VGA-0 --right-of LVDS

It works fine in clone mode, but after running the above the background 
is black, and no windows show. The mouse cursor is still visible though.
This is a bug in xf86-video-ati - I reverted the drm lib to the gutsy 
version and I still have the problem.
How do I pull a known date from git so I can go back to the working version?

Cheers
Phil

Alex Deucher wrote:
> On Sat, Mar 22, 2008 at 6:07 PM, Phil Shotton <phil@stairbridge.org.uk> wrote:
>   
>> I've been experiencing complete lockups when viewing some videos or DVDs.
>>  Not all video formats are affected, but I've not been able to make any
>>  judgement as to which work and which don't. Even ones that work will
>>  usually freeze the system if run full-screen.
>>
>>  I'm running Ubuntu Gutsy with all updates on a Thinkpad T60p with ATI
>>  Mobility FireGL V5250.
>>  Using the ATI (radeon) driver - built off git as of 2008-03-06.
>>  Hang happens using mplayer and Movie Player. Usually the screen just
>>  freezes and sound loops, everything locked solid. SysRq special keys
>>  don't work, the only cure is power-off reboot. Sometimes the mouse
>>  continues to move but nothing else!
>>
>>  I suspect ati driver / hardware incompatibility that's only exposed with
>>  movies. Anyone else suffered this.
>>     
>
> If you are using the recently added textured video adapter, you may
> run into issues with the MMIO path on r5xx.  Grab and install the
> latest drm sources
> (http://gitweb.freedesktop.org/?p=mesa/drm.git;a=summary).  If the
> driver is using the CP path, textured video should work pretty well.
> I haven't gotten a chance to debug the issues with the MMIO paths yet.
>  Also, you'll probably want to update xf86-video-ati as well if you
> want to use textured video.
>
> Alex
>