KVM-28 + RHEL5 = mouse disappears

Hello list,

I am experiencing the following problem with the latest KVM release. 
Whenever I start a guest and click on its window, the mouse cursor will 
"disappear" (actually, it just gets stuck in one of the corners and will 
not move away from there). So, mouse inside the guest is totally unusable.

Here is some basic info:

* CPU model: Intel Core 2 Duo
* KVM version: KVM-28
* Host: RHEL5 x86_64, kernel 2.6.18-8.1.6
* Guest: RHEL5 x86_64
* qemu command line: qemu -hda VM_test.img -cdrom RHEL5_x86_64.iso -boot 
d -m 512
* the problem DOES appear with the -no-kvm switch as well

I can reproduce my problem by following these steps:

* create a guest image
* start a RHEL5/CentOS5 installation
* wait for Anaconda to finish configuring the Xorg server (the mouse 
cursor will be visible in the middle of the window)
* click on the window and move the mouse - the cursor will get stuck on 
one of the corners and not move anymore

I would like to point out that I have used KVM-26 on top of RHEL5's 
kernel 2.6.18-8.1.3 for weeks without any problem. Today, I upgraded 
both KVM and kernel to their latest versions and something broke. Last 
thing, typing dmesg I get this line:

"kvm: emulating exchange as write"

though I guess that is unrelated to the mouse problem (it gets printed 
before focusing the VM window).

Please let me know how can I help testing/debugging this issue.

Thanks,


Alessandro

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