I'm running a Windows 10 guest in KVM under an openSUSE Tumbleweed host. I occasionally need Windows on my laptop for creative applications such as Photoshop and KVM has been great so far. However, when I use my Wacom Intuos Pen and Touch graphics tablet connected through USB, the cursor does not move. Pressure and buttons work as expected and I can still click on things, but I can't see what I'm doing. This happens both with spice USB redirection and with PCI passthrough of the USB controller. The problem only occurs when I use the QXL display mode- however, under a Windows guest this appears to be the only display mode where I can change the resolution.
To clarify- when I use the tablet with a Windows VM and the spice display protocol with the QXL driver, the cursor in the Windows VM does not move as I move the pen. The pen still works as if there is an invisible cursor. This is bad because I can't see where I am about to click, hence rendering applications such as Photoshop unusable. This is not normal behavior and I am wondering how to fix this. This looks similar to RHEL Bug 509358, but that addresses Linux guests running X.
(I use virt-manager to configure my VMs and am, as of yet, unfamiliar with libvirt.)