First remove XGL sudo apt-get remove xserver-xgl And then follow installation guide on <a href="http://wiki.cchtml.com/index.php/Ubuntu_Hardy_Installation_Guide">http://wiki.cchtml.com/index.php/Ubuntu_Hardy_Installation_Guide</a> I went for the "Method 2: Manual Install". Works perfectly for me. Though they seem to have changed it. Was something else a few days ago. I made a small shell script that will remove xgl and install the requested ATI drivers after downloading them. <a href="http://paste2.org/p/91746">http://paste2.org/p/91746</a> Get the code, save as "ati-installer" on your desktop. Then chmod +x ati-installer sudo ati-installer 8.9 -xgl This will download the ATI drivers version 8.9, remove XGL and install new drivers. Warning : Use the script at your own risk. I made it for personal use. If you don't think you can trust the script, just follow the instructions on the link I sent. :) And a suggestion - go for a fresh install. I mean instead of upgrading, fresh installs (format and install) are somehow better as with each new release, there are a lot of changes that are made. This won't make much of a difference I guess, but just my preference. Abhinav Gupta <div class="gmail_quote">On Fri, Oct 24, 2008 at 1:01 PM, stan <<a href="mailto:stanb@panix.com">stanb@panix.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 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? -- 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 programs. -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div>