I recently partitioned my HD with boot camp and installed ubuntu. For some reason, whenever i try to turn my computer off afterward, it freezes, and won't shut down. I'll have to wait for the battery to die. I have an external hard drive with some time machine backups. Should I just erase my drive, re-partition, and re-install, or is there less drastic action i can take? Sorry if this is in the wrong board, I'm still a noob.