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

[Mario Vukelic]

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?