When running World of Warcraft v3.3.5a on Ubuntu 12.04 LTS with Playonlinux 4.2.2,it only allows me to run the game in 1024x768 screen resolution. Whenever I try to change the resolution in-game, it automatically kicks me to the Ubuntu login screen.

Im not sure if it is possible to run it at a higher resolution on Ubuntu. Any help is appreciated.