[Bug 19842] [Radeon 9250] Blank screen when GDM starts unless NoDRI option used.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19842


Rod Coleman <sanfton-0801 at yahoo.co.uk> changed:

           What    |Removed                     |Added
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                 CC|                            |sanfton-0801 at yahoo.co.uk




--- Comment #8 from Rod Coleman <sanfton-0801 at yahoo.co.uk>  2009-02-01 05:17:33 PST ---
(In reply to comment #7)
> Does setting the AGPMode option help?  Add the following to the device section
> of your config:
> 
> Option "AGPMode" "x"
> where x = 1 or 2 or 4 or 8.
> 
> Try and find what AGP mode works.  If none of the AGP modes help, try:
> Option "BusType" "PCI"
> 

I have almost exact same bug. the interesting thing about AGPmode is that the
driver sets this to AGP8x by default. I think earlier drivers set AGP1x for
safety.

If I set AGP2x, the driver responds (in xorg.0.log) something like: "illegal
mode. AGP8x and 4x only allowed". Using AGP4x crashes the same as 8x.

setting Option "BusType" "PCI" works fine, including the KDE4.1 compositing
effects. But, in this mode the PC seems a lot slower, notably the "bouncing K"
of the KDE hourglass, window repaints etc. But hours of uptime show no crashes.

I will run the radeontool when I am back at my kubuntu PC later and post logs.


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