regression on RV280 card freeze, patch not applicable any more

Michel Dänzer michel at
Tue Oct 8 01:03:45 PDT 2013

On Sam, 2013-10-05 at 15:13 +0200, Jochen Rollwagen wrote:
> I’m running a RV280 based Radeon 9200 card (I know, an ancient card)
> in a Mac Mini G4 (powerpc-architecture) with Ubuntu Precise and the
> latest 3.4.64-kernel/ati driver and get lockups when trying to run the
> card in AGP mode (KMS enabled). The lockups happen when resetting the
> card (that’s what I can infer from the oops-screen).

It's the other way around: The kernel radeon driver resets the card to
try and get it running again after a lockup.

> PCI mode works. After researching I found a old bug that was fixed
> back in 2006 ( that
> looks like the freeze I experience (since PCI mode – which allocates
> 64 MB of memory - works and AGP mode which by default allocates 256 MB
> doesn’t). The card has 64 mb memory.
> So the first question is, could this be the problem that causes the
> lockups ?

Not really. The GART and VRAM memory apertures aren't directly related,
and the fix for the bug above should still be incorporated in the
current radeon KMS code.

Does radeon.agpmode=1 or radeon.agpmode=4 work?

Earthling Michel Dänzer            |        
Libre software enthusiast          |                Mesa and X developer

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