Bug 97421

Summary:	After upgrading to Linux 3.19, desktop no longer works in Xen 4.5.0 dom0
Product:	Virtualization	Reporter:	Ting-Wei Lan (lantw44)
Component:	Xen	Assignee:	virtualization_xen
Status:	NEW ---
Severity:	normal
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	3.19, 4.0, 4.1	Subsystem:
Regression:	No	Bisected commit-id:

Description Ting-Wei Lan 2015-04-28 07:57:52 UTC

My desktop was no longer usable as Xen 4.5.0 dom0 after upgrading to Linux 3.19. Characters become broken after the graphic driver is loaded, and starting Xorg may cause the system to crash. Here is the screenshot: https://bugs.freedesktop.org/attachment.cgi?id=115079

After using git bisect, I found the commit that causes problems is https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=47591df


dmesg:
https://bugs.freedesktop.org/attachment.cgi?id=115080

The [drm] GPU HANG message is caused by Xorg. If I don't start Xorg, there is no error message.


/sys/class/drm/card0/error:
https://bugs.freedesktop.org/attachment.cgi?id=115081


Hardware:
Intel Core i5 CPU 650 @ 3.20GHz
Intel Ironlake Desktop