Red Hat Bugzilla – Bug 142046
XEN Graphical bugs and application instability in Xen domain 0 on Thinkpad T21.
Last modified: 2007-11-30 17:10:56 EST
(Don't know if kernel is the right component...) Description of problem: When using Xen on my IBM Thinkpad T21 (S3 Savage/IX-MV graphics), several programs have problems with their X11 GUIs and crash very often. Using kernel-2.6.9-1.1018_FC4xen0. The problem goes away if I switch to kernel-2.6.9-1.1018_FC4. (Yes, tls is disabled.) Symptoms: Metacity titlebar sometimes becomes only a few pixels high, Firefox display big single-coloured rectangles on top of the text, Evolution fails to display the text in the message list. These apps also crash very often. How reproducible: Always. Steps to Reproduce: 1. Install and update FC3. 2. Install Xen from http://people.redhat.com/riel/ 3. mv /lib/tls{,.disabled}, edit grub.conf etc... 4. reboot and log in to X
Does this bug happen if you add the following to the Device section of your xorg.conf ? Option "NoAccel" "yes"
Yes, it does.
OK, added to my list of things to look at. I will try to finish the basic packaging of Xen first though, before diving head-first into fixing up Xen internals. In the mean time, we can try some workarounds. One thing you can try is: Option "BusType" "PCI"
> before diving head-first into fixing up Xen internals. Yes, of course. :-) > Option "BusType" "PCI" No, still no change, neither alone nor in combination with NoAccel, even after a reboot.
Upgraded to 2.6.9-1.1020_FC4xen0. Didn't help.
The xen agpgart patch is in kernel 2.6.10-1.1120_FC4. That patch may well fix (part of) your X problems.
Hmm, now agpgart won't initialize. I filed bug #147258.
There was an FPU context saving bug in the patch I created here to have xen compile with the 2.6.11-rc kernel in rawhide. That bug is fixed in kernel 2.6.11-1.1176_FC4. I still don't have 3D applications running here (at least not bzflag), but the normal graphical instability here seems to have gone away. Could you please verify whether kernel 2.6.11-1.1176_FC4 still has this bug?
Sorry, I still can't get X to work at all in Xen0. I'm using 2.6.11-1.1177_FC4xen0. (bug #147258)
Should be fixed in current Fedora Core 5 rawhide Xen packages.