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Created attachment 782712 [details]
graybar screen shot

Description of problem:
Gray start bar of rhel shows in first text terminal of the rhel guest when send key Ctrl+Alt+Backspace followed by Ctrl+Alt+F2

Version-Release number of selected component:
virt-viewer-0.5.6-6.el6.x86_64
libvirt-0.10.2-21.el6.x86_64

How reproducible:
100%

Steps:
1. RHEL guest with X running is available.
2. connect to guest by virt-viewer.
#virt-viewer guest_name
3. Go to Send key -> Ctrl+Alt+Backspace
4. Then Send key->Ctrl+Alt+F2
5. Send key->Ctrl+Alt+F1

Actual results:
After step5:Gray starting bar of rhel shows in the first text terminal and stays there until restart the guest.
It reproduce for both vnc and spice. And it reproduce by following the same steps in virt-manager

Expected Results:
Gray starting bar of rhel doesn't show.

most likely a qxl driver or server bug

that's not a spice bug, the graphical console is on f7.

moving to gdm (I am not sure what component is responsible here)

*** Bug 992914 has been marked as a duplicate of this bug. ***

if you don't do steps 4 and 5, what happens?

Without steps 4 and 5, just send key combination Ctrl+Alt+Backspace, the guest twinkles and the user login interface displays. 
Ctrl+Alt+Backspace combination restarts X server.

can you attach /var/log/Xorg.*  after reproducing the bug?

okay GDM should try to pick vt1 again and it's not.  devack+

backported fix from upstream

minor update to avoid some unwanted log spew

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-2014-1591.html