Since I installed Ubuntu 11.04, one of the following things happen when I try to login:
- I see my wallpaper and my mouse cursor, but nothing else loads. Every ~10-20 seconds, the screen goes black for about one second, then shows just my wallpaper and mouse cursor again. This happens about 60% of the time that I try to log in.
- I see my wallpaper and my mouse cursor, but after ~10-20 seconds, the screen goes black and stays black until I turn off my computer. This happens about 15% of the time that I try to login in.
- I see a screen like the one in the below image (open the image in a new tab to see it in greater detail). I believe it is warning about a problem with compiz or my radeon drivers. This happens about 15% of the time that I try to log in.
- Login is successful. This happens about 10% of the time that I try to log in.
I see the problem both in the "Unity" session and the "Ubuntu Classic" session. It does not appear to occur in "Ubuntu Classic (no effects)", but I have not tested that exhaustively.
I am running Ubuntu 11.04 with latest updates on a Dell Studio XPS 16. My videocard is a Radeon HD 4670. The full result of
sudo lshw -sanitize is here.
Does anyone know what's going on? I apologize if this is the wrong place for such a question. I thought that I should report on Launchpad bugs, but
ubuntu-bug requested that I ask on this site before filing a bug.