This is an up to date F20 host and F20 guest.
Started with a resolution 1024x768, right click gnome desktop->settings->displays->change resolution to 1280x960. After resolution changes, the mouse pointer is not visible in the VM.
The mouse still works in the guest and prelights widgets, but the pointer can't be seen. Switching to a VT in the guest and back to the desktop fix it.
Reproduced with and without spice-vdagent in the guest.
FWIW there's also a guy here mentioning some 'disappearing pointer' related issues with an F20 guest on F19, maybe they are related:
I think this is a drm regression, I think there is a qxl or kernel bug already, I'll try to find it later.
*** This bug has been marked as a duplicate of bug 1008965 ***
The referenced packages don't make any difference, still 100% reproducible.
(In reply to Cole Robinson from comment #3)
> The referenced packages don't make any difference, still 100% reproducible.
the bug is still open there, adding dep. It is very unlikely a spice-gtk bug, but rather a mutter/mesa/qxl issue.
this also appear on my _physical_ laptop as documented in Bug 1008965 and on KDE
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Works fine with f22 host and f22 VM now