osu!tablet/Huion H420 (probably other Huion tablets also) can work fine under Linux upon installing the driver found here: https://github.com/DIGImend/huion-driver
According to my earlier feedback, it would seem the tablet "can" work fine as-is without the driver, but I wasn't able to reproduce such results. The problem is, is that the tablet ended up being mapped to a small section at the top-left of my screen, on two different computers, with two different distros (openSUSE 13.1, Xubuntu 13.10, and Xubuntu 14.04).
According to my earlier feedback, it would seem the tablet "can" work fine as-is without the driver, but I wasn't able to reproduce such results. The problem is, is that the tablet ended up being mapped to a small section at the top-left of my screen, on two different computers, with two different distros (openSUSE 13.1, Xubuntu 13.10, and Xubuntu 14.04).