I have had this issue happen multiple times on multiple versions of kvm with both ubuntu and cantos. I just the other day tried installing win8.1 again for testing and ran across ruban's post. this happens in win10 as well and I think I had seen it in win7.
I reinstalled another win8 vm from a usb instead of an iso later that day and realized that the mouse was working normally which surprised me. I then manually installed the virtio nic driver. the system still worked normally. I then installed the baloon driver and that make the mouse stop working untill i pulled the flash drive. after changing the power settings the mouse would again start working with the flash drive. I have always used virt manager for connecting to the servers and spice for the display ** Changed in: qemu Status: Expired => Confirmed ** Changed in: qemu (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1323758 Title: Mouse stops working when connected usb-storage-device Status in QEMU: Confirmed Status in qemu package in Ubuntu: Confirmed Bug description: I'm running a guest that has Windows 8 Pro (x64) installed. Every time I pass through a usb storage device from the host to the guest, the mouse stops working in the vnc client. When I remove the usb-device the mouse works again. The mouse only stops working when I pass through a usb storage device and then make the vlc viewer (client) inactive by clicking on another program on the local computer (where I'm running the vnc viewer (client)). As long as I keep the vnc viewer active, the mouse works without any problems. But as soon as I make the vnc viewer inactive and then active again, the mouse will no longer work. I have to reboot the guest or remove the usb storage device. I can't find any related problems on the internet, so it may be just me? I hope someone can help me with this. EDIT: I posted the extra/new information in comments. But as I know see it might be wrong and maybe I should've posted them in this bug description container (by editing)? Please tell me if I did it wrong and I will change it. Sorry for this misunderstanding. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1323758/+subscriptions