Sorry I don't have any useful data to add to this, but I have recently seen this problem also on a notebook. I had been running 8.10 for some time and recently upgraded to 9.04, and this problem existed in both releases, however seemingly more and more often these days, but not tied to the upgrade, Seems to be happening multiple times a day now.
Symptoms were best described as non responsive window manager; ie I could move the mouse but clicking did not do anything I have to force a shutdown using alt ctrl del and wait for the auto shutdown to take place, I think sometime ago I could fix by alt ctrl backspace, but no longer. Also a long time back right clicking on the web page and going back would fix, but no longer. I'm not sure what series of events causes this, This laptop has only 500mb ram also. I've started using Opera today and so far not seen any lockups. I have never seen this on my 8.04 desktop system or any other ubuntu releases I have used. It does seem to be tied to this latitude D600 -- firefox freezes https://bugs.launchpad.net/bugs/117078 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
