The qemumips machine uses mousedev, not the usb wacom tablet which means qemu has to grab the mouse cursor. It would be nice to avoid needing the grab.
We'll have a look at this, the fix is low risk, so we should be able to make the switch once we get it figured out. This is next on the list once the h/w BSPs are completed.
http://git.pokylinux.org/cgit/cgit.cgi/poky/commit/?id=bca56bfcc9a9cf745a5864f000a8af0f0421c1be
Bernard http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=d739fc53ebd49c9735f78b6036f54669ba825ea7