Hi, I've been looking into this issue recently, and this indeed is an issue with the usb-tablet usb-2 mode. A fix for this is here: http://www.kraxel.org/cgit/qemu/commit/?h=usb.79&id=aa1c9e971e80d25b92908dce3dec7c38b49480ea
And should go upstream soon and hopefully will make it into 1.4.1 too. Regards, Hans