Bug 1023360

Summary:	mice changes to PS/2 from usb tablet after migration with -M 6.0.0 or 6.1.0 (vnc)
Product:	Red Hat Enterprise Linux 6	Reporter:	Shaolong Hu <shu>
Component:	qemu-kvm	Assignee:	Gerd Hoffmann <kraxel>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.5	CC:	acathrow, bsarathy, juzhang, michen, mkenneth, qzhang, virt-maint
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-04-16 11:20:42 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Shaolong Hu 2013-10-25 09:22:11 UTC

Description of problem:
--------------------------
On latest RHEL6.5 host, migrate guest with -M 6.0.0 or 6.1.0, after migration, info mice shows PS/2 instead of usb tablet, and on des host, mice suffers from dislocation problem. It works fine with -M 6.2.0, 6.3.0, 6.4.0 and 6.5.0, all RHEL6 Z stream has the same problem.

We find this in recent round of stable guest abi test, it seems we have this problem for a long time, probably a WONTFIX one, but i fail to locate the old bug.


Version-Release number of selected component (if applicable):
---------------------------------------------------------------
qemu-kvm-0.12.1.2-2.414.el6
connection: vnc
guest: win2012-64


How reproducible:
--------------------
100%


Steps to Reproduce:
--------------------
1. ping pong migration

CMD:

/usr/libexec/qemu-kvm -enable-kvm -M rhel6.1.0 -smp 4 -m 4G -name win2012 -uuid 3f2ea5cd-3d29-48ff-aab2-23df1b6ae213 -drive file=nfs/win2012-64-virtio.qcow2,cache=none,if=none,rerror=stop,werror=stop,id=drive-virtio-disk0,format=qcow2,aio=native -device virtio-blk-pci,drive=drive-virtio-disk0,id=device-virtio-disk0 -netdev tap,script=/etc/qemu-ifup,id=netdev0 -device virtio-net-pci,netdev=netdev0,id=device-net0,mac=aa:54:00:11:22:33 -boot order=cd -monitor stdio -usb -device usb-tablet,id=input0 -chardev socket,id=s1,path=/tmp/s1,server,nowait -device isa-serial,chardev=s1 -vnc :10 -monitor tcp::1234,server,nowait

Comment 2 Qunfang Zhang 2013-10-27 10:53:14 UTC

Maybe a similar issue with:
Bug 823846  - USB tablet mouse does not work well when migrating guest rhel6.0->rhel6.3 or rhel6.1->rhel6.3

According to Gerd, usb tablet migration in 6.0 and 6.1 is broken.

Comment 3 RHEL Program Management 2013-11-01 08:26:37 UTC

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Comment 4 Gerd Hoffmann 2014-04-16 11:20:42 UTC

> On latest RHEL6.5 host, migrate guest with -M 6.0.0 or 6.1.0, after
> migration, info mice shows PS/2 instead of usb tablet, and on des host, mice
> suffers from dislocation problem. It works fine with -M 6.2.0, 6.3.0, 6.4.0
> and 6.5.0, all RHEL6 Z stream has the same problem.
> 
> We find this in recent round of stable guest abi test, it seems we have this
> problem for a long time, probably a WONTFIX one, but i fail to locate the
> old bug.

WONTFIX indeed.  live migration support for usb devices was added in 6.2.0.
For bug compatibility reasons it must be turned off for 6.1.0 and 6.0.0
machine types.  So live migration with these machine types and usb devices
has a few known issues which can't be fixed without breaking live migration
to RHEL-6.{0,1} qemu-kvm versions.