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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.

enter image description here

  • 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.

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closed as off topic by htorque, Takkat, fossfreedom, Oli Jun 26 '11 at 9:01

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

It's safe to say that you are hitting a bug. All we need to do now is to determine if that bug already has been reported or is a new one. – htorque Jun 25 '11 at 16:08
There you go: bug 783458. Subscribe, mark yourself as affected by the bug. This question will be closed as is the wrong platform for bugs. – htorque Jun 25 '11 at 16:22
Thanks, @htorque. Out of curiosity, why does ubuntu-bug now point me to I suspected that askubuntu was the wrong platform for this question, but was thrown off by ubuntu-bug's directions. – Matthew Pirocchi Jun 25 '11 at 18:48
I have not the slightest idea. :-) – htorque Jun 25 '11 at 19:07
I'm over-simplifying things but ubuntu-bug is trying to get users to research things as much as possible before they file a bug. While that's a noble gesture the-powers-that-be seemingly think it's better to fill up AU with bug reports before they accept a bug on LaunchPad, which is just moving the problem. In short, somebody needs to improve the language ubuntu-bug uses. I hope you get a fix, anyway. – Oli Jun 26 '11 at 9:05