Upgrade to 8.04 and now Xgl is using 95% of CPU

stan stanb at panix.com
Fri Oct 24 17:44:21 UTC 2008

On Fri, Oct 24, 2008 at 07:24:01PM +0200, Mario Vukelic wrote:
> On Fri, 2008-10-24 at 13:01 -0400, stan wrote:
> > I just upgraded my laptop to 8.04, in preparation for going to 8.10, and
> > noticed it became very slow. I ran top and discovered that Xgl is now using
> > over 90%  of the cpu with virtually nothing going on, other than being logged
> > into a X (KDE) session). The Xorg startup log identifies the card as:
> > 
> > (--) PCI:*(1:5:0) ATI Technologies Inc RS485 [Radeon Xpress 1100 IGP] rev 0
> > 
> > And I am using the closed source graphics driver.
> > 
> > What should I check next to try to resolve this issue?
> If you are not married to Xgl, you can uninstall it. AFAICT (I don't
> know if this is limited to certain cards), the fglrx driver in 8.04
> supports the AIGLX extension that is built into xorg.
> I am not sure, however, if you need to perform any manual steps to
> migrate from Xgl to AIGLX -- did you have to make any changes in
> xorg.conf to get Xgl going?

No, and I will admit that I am not even certain what it does :-) I do want
to run compiz on this machine, if it is powerful enough to, but at the
moment, it does not seem to be running.

Mind educating me a bit?

One of the main causes of the fall of the roman empire was that, lacking
zero, they had no way to indicate successful termination of their C

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