[gnome] Changing the priority of process

view full story

http://ubuntuforums.org – I'm having some problems with GNOME 3 Shell, it works fine with the latest ATI Driver 12.1 but so far I'm having two problems, The performance is slow and sometimes the shell flashes and disappears then returns back in few seconds, but sometimes it disappears and suddenly falls back to classic mode without panel and all I can do is pressing alt+ctrl+del to logout and then login back again. So I thought that I might get a better profromnce if I could give GNOME-Shell the highest priority, but I couldn't change the priority on the System Monitor, an error messeage says: Can't change priority's p (Hardware)