[ltp] Switching from fglrx back to radeon?

[Gavin W. Burris aka 86]

Same problem here.  I'm guessing that the fglrx driver changes quite a
few settings on the video card that the radeon driver doesn't know
about, and they are only re-initialized after a hardware reset.

Jiang Qian wrote:
> Hi All:
> In order to view stellarium, I installed the latest proprietary fglrx 
> driver for 3D. I switched to a xorg.conf file with fglrx driver, 
> everything works fine with 3D acceleration. However when I stopped X, 
> then copy back the old xorg.conf file and restart x with radeon driver, 
> the screen is garbled. See this:
> http://physics.harvard.edu/~jqian/computer/garbled_screen.png
> When I switch again to fglrx driver it is fine again. The problem is 
> that I can't get fglrx driver to sleep, so I'd like to have my radeon 
> driver xorg back when I'm done with stellarium stuff. Any idea how?
> 
> After a full reboot back to radeon driver, it is fine. Yet the funny 
> thing is that if I init 1 then init 5, without going through the total 
> reboot, the radeon is still garbled. Why does it make a difference 
> between a full reboot and init 1 then init 5?
> 
> /var/log/Xorg.log does not show any warning about radeon driver.
> 
> I'm using ubuntu Hoary with 2.12.4 kernel and fglrx version 8.18.8
> 
> Thanks in advance for any suggestion.

-- 
Gavin W. Burris aka 86
Senior Systems Programmer
Penn State Visualization Group
http://viz.aset.psu.edu/ga5in