[Xen-users] qemu-dm dom0 high CPU usage when usbdevice=tablet

[Christian Fassina Costa <atros@xxxxxxxxx>]

Hey guys,

It seems like the qemu-dm processes on the dom0 use quite a lot of CPU when usbdevice=tablet is used for a Windows a guest.

Setting that to 'none' fixes the problem, however, the mouse pointer doesn't track correctly when connecting to VNC. This is what I found out from looking at other reports of this problem.

A hypervisor running Xen 4.0.1 with aÂ2.6.32-5-xen-amd64 doesn't seem to exhibit the same high CPU usage.

I've also tried it on different set ups:

- Xen 4.1.5 andÂ3.2.0-61-generic

- Xen 4.1.6.1 andÂ3.2.0-51-generic

Just wondering if anyone would have a solution for this issue. I did some research and it looks like quite a few people have come across this problem.Â

I'm also not sure if this is the right place to be asking that, however, since I couldn't find any bug reports so I'm wondering if perhaps there is a solution to the high CPU usage or the mouse tracking over VNC.

Any help or pointers as to how this could be solved would be appreciated.

Kind regards,

Christian

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