Radeon KMS testing ( RV280 )

Michel Dänzer michel at daenzer.net
Tue Jul 14 02:24:34 PDT 2009

On Tue, 2009-07-14 at 15:26 +1000, Dan wrote:
> I've finally built a 2.6.31-rc kernel that boots. Not sure what's been
> going on there. Anyway, I've been keen to test KMS & TTM stuff.
> Unfortunatley, it's a double no-go.
> When the radeon module loads ( I assume for flicker-free boot, I'll
> have to build it into the kernel, and not as a module ), the screen
> goes black, and I get a warning that the current mode is out of range.
> Is there some kernel arg to override the default settings? Should the
> radeon module already be detecting supported modes?
> Next, when X tried to load, it crashes ( with a very corrupted image -
> didn't switch back to the console and give me 'current mode out of
> range' error ... should it? ). See log at:
> http://entropy.homelinux.org/Xorg.KMS.log

Check dmesg for drm or agp related output. If it looks like AGP is
failing, try reducing the radeon.agpmode parameter value, in the worst
case down to -1 to disable AGP.

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

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