In my case, a Core2Quad with 4GiB of RAM and a GeForce 9800GT, with a clean kubuntu 9.04 plus ubuntustudio-audio: booting into -rt (and after hitting #360309 and installing linux-headers-rt) freezes sometime after entering the session, sometimes sooner, others later.
My system seems to be totally frozen, not just mouse and/or keyboard.
In my case, a Core2Quad with 4GiB of RAM and a GeForce 9800GT, with a clean kubuntu 9.04 plus ubuntustudio-audio: booting into -rt (and after hitting #360309 and installing linux-headers-rt) freezes sometime after entering the session, sometimes sooner, others later.
My system seems to be totally frozen, not just mouse and/or keyboard.