Bug 253221

Summary:	PVFB fails to update when installing 32-bit FC-6 guest in 64-bit host
Product:	Red Hat Enterprise Linux 5	Reporter:	Markus Armbruster <armbru>
Component:	xen	Assignee:	Markus Armbruster <armbru>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	low
Version:	5.0	CC:	xen-maint
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	RHBA-2008-0305	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-05-21 15:19:48 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Markus Armbruster 2007-08-17 13:50:01 UTC

Description of problem:
When I install a 32-bit FC-6 guest in a 64-bit host, the PVFB window fails update.

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


How reproducible:


Steps to Reproduce:
1. /usr/sbin/virt-install --name fc6pv32 --ram 384 --file
/var/lib/xen/images/fc6pv.img --file-size 5 --vnc -p --location
SOME-MIRROR/core/6/i386/os/
2. 
3.
  
Actual results:
The PVFB window comes up, but it doesn't update.  If I terminate virt-install by
closing the window, then start run vncviewer:0, I can see a newer screen, still
not updating.  Same if I restart vncviewer.

Expected results:
The PVFB window opened by virt-install updates.

Additional info:

Comment 1 Markus Armbruster 2007-09-07 14:27:15 UTC

Update notification events do not arrive in the backend.

If I replace the frontend in kernel-2_6_18-1_2798_fc6 by a trivial backport of
the current version, updating works.  

Note that the unchanged kernel talks the old fb protocol, hence uses the
xen-vncfbo backend, while the patched kernel talks the new protocol, hence uses
xen-vncfb.

Comment 2 RHEL Program Management 2007-10-24 16:04:57 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 3 Markus Armbruster 2007-10-25 18:40:16 UTC

This bug has been fixed in Fedora (xen-3.1.0-5_fc7).  The fix works for RHEL-5
as well.

Comment 5 Daniel Berrangé 2008-01-03 21:10:12 UTC

Fix built for QA

$ brew latest-pkg dist-5E-qu-candidate xen
Build                                     Tag                   Built by
----------------------------------------  --------------------  ----------------
xen-3.0.3-43.el5                          dist-5E-qu-candidate  berrange

* Thu Jan  3 2008 Daniel P. Berrange <berrange> - 3.0.3-43.el5
- Update 32-on-64 PVFB compat fix (rhbz #253221)

Comment 8 errata-xmlrpc 2008-05-21 15:19:48 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2008-0305.html