#553 QEMU USB Tablet mouse pointers not lining up

[Simon Cadman]

I've been running AROS in a KVM/QEMU-based VM, and am trying to use the QEMU Tablet USB device to align the host and client mouse pointers.

When running qemu with this command:

qemu-system-i386 -M accel=kvm -m 2G -boot d -drive file=aros-abi-1-nightly-2017-10-05.iso,index=0,media=cdrom -device usb-tablet -usb -spice port=5900,addr=127.0.0.1,disable-ticketing

The mouse pointers are usually slightly out ( it's most obvious on the spice-html client ). It seems the issue is related to clipping being enabled by default for the QEMU USB Tablet.

Attached is a patch which disables it by default for the QEMU vendor and seems to fix the problem.

Thanks