I have a Wacom Bamboo that works out-of-the-box on Ubuntu 11.10 (even pressure). The problem, though, comes when using it on VirtualBox.
If I don't allow VB to access it, it recognizes the tablet as a mouse and works well (the same as when you plug the tablet the first time in Windows [normally, not on VB] and don't install the drivers). However, when I install the drivers and allow VB to access the tablet via "USB devices" it becomes really slow. I get pressure-sensitivity in Photoshop, but in exchange of a lag of seconds.
The question is.. is there a chance to solve this or is this something inevitable when using a tablet through VirtualBox?
Sorry, forgot some info:
Virtualbox version is 4.1.8 (Oracle version, not the OSE), guest is Windows 7 (though I think it happened the same in XP).