Red Hat Bugzilla – Bug 229480
dom0: panic w/X on i965 (appears to be agpgart?)
Last modified: 2009-12-14 15:37:52 EST
+++ This bug was initially created as a clone of Bug #214635 +++
Description of problem:
Usage of X on i965 under dom0 often panics the kernel, leading to a fault that
spontaneously reboots the machine.
Operations that can cause this:
1) starting X (has happened in gdm)
In my case, the problem manifests with display corruption of the lower half of
the X display and a garbled cursor (running KDE) but the host is apparently
functional as I am writing this (kernel-xen-2.6.19-1.2911.fc6).
According to Intel documentation, the i965 family uses system memory for the
graphics adapter so, since this host has 4 GB, I tried booting with mem=3G
title Fedora Core (2.6.19-1.2911.fc6xen)
module /vmlinuz-2.6.19-1.2911.fc6xen ro root=/dev/sys_vg/root_lv
all-generic-ide quiet mem=3G
which apparently fixed the display corruption problem.
Typing in a terminal and running glxgears apparently worked OK also using said
However, attempts to create a new fully virtualized Xen image consistently
produce display corruption and lock up the host.
change QA contact
This report targets FC6, which is now end-of-life.
Please re-test against Fedora 7 or later, and if the issue persists, open a new bug.