Great slowness with radeon(4x) and AccelMethod "EXA" for X.Org 7.2

Michel Dänzer michel at
Mon Jun 18 08:20:44 PDT 2007

On Mon, 2007-06-18 at 16:05 +0100, Chris Rankin wrote:
> > On Sat, 2007-06-16 at 11:19 +0100, Chris Rankin wrote:
> > > I tried using XOrg 7.2 with a compositing manager 
> --- Michel Dänzer <michel at> wrote:
> > Which one(s)?
> compiz, from Fedora 7.

Okay, I was referring to non-GLX compositing managers such as xcompmgr,
xfwm4 etc.

For compiz, you need someone to implement zero-copy tfp for the r200 3D
driver, then use the master branches of xserver (to become 1.4) and
xf86-video-ati (to become 6.7) with EXA. Meanwhile, as you found out,
disabling 2D acceleration with Option "XaaNoOffscreenPixmaps" or Option
"FBTexPercent" "100" (more or less same effect with EXA) seems to be the
least of evils.

Earthling Michel Dänzer           |
Libre software enthusiast         |          Debian, X and DRI developer

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