Bug#620858: xserver-xorg-video-radeon: slow overall performance upon wake-up from suspend

Michel Dänzer daenzer at debian.org
Tue Apr 5 07:32:10 PDT 2011

On Die, 2011-04-05 at 10:02 -0400, Andres Cimmarusti wrote: 
> >>> [ 2183.658014] [drm] radeon: 1 quad pipes, 1 z pipes initialized.
> >>
> >> The kernel radeon driver isn't consistently reporting the number of quad
> >> pipes. Does the slowness correspond to the number being reported as 1?
> >
> > I've just checked this. Yes, it's slow when the number is reported as
> > 1 (which happens both waking up from suspend, and when using
> > vblank_mod=0).

The latter can't really be true like that, as the number of pipe quads
is only probed and printed at initialization and resume time.

> So, this is rather strange. With a vanilla kernel (using
> debian config file to compile + two cpu customizations) the quad
> number is generally reported as 3, but goes to 1 upon resuming from
> suspend.
> With kernel 2.6.38-2 from debian main, quad seems to be 1, but after
> resuming it goes to 3.

So in the latter case, is it slow initially but becomes fast after
resume? :)

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

More information about the xorg-driver-ati mailing list