+++ 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 like this: title Fedora Core (2.6.19-1.2911.fc6xen) root (hd0,0) kernel /xen.gz-2.6.19-1.2911.fc6 module /vmlinuz-2.6.19-1.2911.fc6xen ro root=/dev/sys_vg/root_lv all-generic-ide quiet mem=3G module /initrd-2.6.19-1.2911.fc6xen.img which apparently fixed the display corruption problem.
Typing in a terminal and running glxgears apparently worked OK also using said workaround.
However, attempts to create a new fully virtualized Xen image consistently produce display corruption and lock up the host.
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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. Thanks