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Bug 235538 - i686 fc6 xen kernel crashes on boot during agpgart init
Summary: i686 fc6 xen kernel crashes on boot during agpgart init
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel-xen
Version: 6
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Eduardo Habkost
QA Contact: Virtualization Bugs
Depends On:
TreeView+ depends on / blocked
Reported: 2007-04-06 21:02 UTC by George Shearer
Modified: 2009-12-14 20:37 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2008-02-27 00:04:00 UTC

Attachments (Terms of Use)
Full bootlog of xen kernel boot up and crash. (deleted)
2007-04-06 21:02 UTC, George Shearer
no flags Details

Description George Shearer 2007-04-06 21:02:23 UTC
Description of problem:

fc6 i686 kernel crashes on boot during agpgart init. Regular non-xen kernel
works fine.

Version-Release number of selected component (if applicable):

kernel-2.6.19 and newer official FC6 released kernels. I have not tried any
older kernels.

How reproducible:

Happens every single time reliably.

Steps to Reproduce:
1. Tell Grub to boot on Xen kernel.
2. Watch dmesg.. 
Actual results:

During boot:

Linux agpgart interface v0.101 (c) Dave Jones
agpgart: Detected an Intel 965G Chipset.
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000008

Expected results:

Not to crash..

Additional info:

Setting agp=no in kernel boot flags of dom0 fixes this problem.

Hardware configuration:

Gigabyte GA-965P-DS3 motherboard (rev 1.0, bios F10)
Intel Conroe E6400 (Core 2 Duo) CPU
4-gigs DDR2-800
ICH8 Northbridge.

Please note that non-xen kernels work very happily and very reliably on this system.

Comment 1 George Shearer 2007-04-06 21:02:23 UTC
Created attachment 151897 [details]
Full bootlog of xen kernel boot up and crash.

Comment 2 Chris Lalancette 2008-02-27 00:04:00 UTC
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.


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