X performance woes

Marius Gedminas marius at pov.lt
Mon Apr 20 08:08:46 UTC 2009

On Sun, Apr 19, 2009 at 02:02:21PM -0400, Hal Burgiss wrote:
> On Sun, Apr 19, 2009 at 10:15 AM, Marius Gedminas <marius at pov.lt> wrote:
> > On Sat, Apr 18, 2009 at 04:34:34PM -0400, Hal Burgiss wrote:
> >> After upgrading to 8.10 I am still having awful X performance issues.
> >
> > What's your hardware?
> >
> > The most relevant bit would be the video card (lspci -nn |grep VGA).
> 00:02.0 VGA compatible controller [0300]: Intel Corporation 82946GZ/GL
> Integrated Graphics Controller[8086:2972] (rev 02)

> > What's your uptime?
> Well I just rebooted, but it was probably 3 weeks or so at that point.
> I am philosophical opposed to rebooting. It should be outlawed in all
> civilized nations.

This is a bit off-topic, but I agree completely.

> > Sysprof or oprofile could help pinpoint the cause of the problem, but
> > first it might be simpler to see if you're using the right X video
> > driver with the right options, and for that we need to see your
> > xorg.conf and Xorg.0.log.
> Please look. Its a bit of a mystery to me trying to decipher all that.

I'm not a guru either.  Everything seems fine (intel driver, kernel
digital rendering module loaded successfully, uses EXA, no weird custom
settings in xorg.conf).

> > Also, do you use desktop effects (that is, Compiz)?
> No.

You may want to try with them on (I believe Xfce also has a checkbox
somewhere).  It might be that you're triggering a bug that slows down
only non-composited text rendering.

Other than that, I have no concrete ideas or suggestions.  Your options are:

  * look for similar bug reports on launchpad.net (better make that
    exact bug reports: intrepid + Intel 82946GZ/GL [8086:2972]) and add
    a "me too"; alternatively file a bug report on

  * try to attract attention from X.org developers somehow (if we're
    talking upstream ones, it would work better if you tried to build
    and use the latest drivers)

  * try a Jaunty live CD and see if it got better or worse

Marius Gedminas
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