X.org's radeon(4x) slowness (was: X.org 7.2 eats the whole CPU whenever Firefox 2 displays) something

[Jeremie Le Hen]

Hi all,

(I've cross-posted to -x11@ since it appears this problem is related
to X.org, not Firefox.)

On Thu, May 31, 2007 at 04:18:56PM +0200, Jeremie Le Hen wrote:
> Nonetheless, this PR reminds me that libpthread switched from libkse
> to libthr.  I'm going to try libkse when I'll be back home in a couple
> of hours and I will send a follow-up here.  Eventually I will file a PR
> if needed.

FWIW I've tested with libkse, this doesn't change anything.


However a friend of mine (Xavier Lapie <bana at docisland.org>)
investigated the problem further and found the solution:

Actually we are both using the X.org's radeon driver with:
    Option "AccelMethod" "EXA"

According to radeon(4x) manpage, "EXA" is supposed to be faster than
the traditional mode "XAA" but it is also newer and possibly unstable.

Removing this option or switching back to the VESA driver solves the
slowness.

Sorry for the noise, I will send a mail to X.org's developpers.

Best regards,
-- 
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >