Bug#575681: xserver-xorg-video-radeon: shows severe artifacts since switching to KMS

[Michel Dänzer]

On Wed, 2010-03-31 at 13:38 +0200, Fabian Greffrath wrote: 
> Am Sonntag, den 28.03.2010, 12:50 -0400 schrieb Alex Deucher:
> > Does changing the agpmode or disabling AGP help?  Add:
> > radeon.agpmode=X
> > where X = -1, 1, 2, or 4 to the kernel command line.  -1 will use pci
> > gart rather than agp.
> 
> Sorry, but no. I tried for all values of X that you suggested, but the
> weird artifatcs persisted.
> 
> Maybe this has to do with my using of a custom modeline (on a CRT
> monitor)?

Not sure how it could be. Your symptoms are really weird. One thing I
wonder:

[    6.093152] [drm] radeon: 2 quad pipes, 1 Z pipes initialized.

Maybe only one of your quad pipes is working properly? I think that
might explain the checkerboard pattern.


> At least I experience mode switches when I switch between X
> and VT, which shouldn't happen if KMS worked as expected, right?

There's no mode switch if X and the console are using the same mode, but
that's probably not the case since you're using a custom modeline.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer