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Description of problem:
  RHEL guest cannot extend its desktop to 2nd monitor after connect to it with remote-viewer for several times.

Version-Release number of selected component (if applicable):
virt-viewer-0.5.2-16.el6.x86_64
spice-server-0.12.0-2.el6.x86_64
spice-glib-0.14-5.el6.x86_64
spice-gtk-tools-0.14-5.el6.x86_64
spice-gtk-python-0.14-5.el6.x86_64
spice-vdagent-0.8.1-3.el6.x86_64
spice-gtk-0.14-5.el6.x86_64
spice-protocol-0.12.2-1.el6.noarch

How reproducible:
Sometimes, about 95%

Reproduce steps:
1. Have a notebook computer and plugged another display to its VGA interface.
2. Install a rhel guest on it, make sure it has spice+qxl device and spicevmc channel.
3. Update spice-vdagent and xorg-x11-drv-qxl
4. Run remote-viewer spice://127.0.0.1:5900 --full-screen=auto-conf
5. Close remote-viewer.
6. Repeat step 4 and 5 for several times.

Actual results:
1. After step 6, 2nd monitor becomes to a mirrored one.

Expected results:
1. 2nd monitor should be an extended monitor.

Additional info:

Created attachment 644605 [details]
debug log

I can reproduce this:
1. Get dual screen physical setup.
2. Connect to a guest with remote-viewer.
3. Go to fullscreen (even with one guest screen VM).
4. change resolution within the guest

-> suddenly two mirrored screen shows up.

Note sure this is a bug of virt-viewer, mostl likely spice-vdagent.

*** Bug 908822 has been marked as a duplicate of this bug. ***

I can reproduce this bug:

Version and Steps are same as description.

result:
1. After step 6, 2nd monitor becomes to a mirrored one.

Verify:
# rpm -qa | grep spice
spice-gtk-0.20-1.el6.x86_64
spice-client-0.8.2-15.el6.x86_64
spice-glib-0.20-1.el6.x86_64
spice-vdagent-0.14.0-1.el6.x86_64
spice-server-0.12.3-1.el6.x86_64
spice-gtk-python-0.20-1.el6.x86_64
# rpm -qa virt-viewer
virt-viewer-0.5.6-1.el6.x86_64

Steps:
Same as description.

Result:
2nd monitor should be an extended monitor.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1578.html