Comment 2 for bug 882817

I also submitted a bug report, but have now marked it as a duplicate of this one.

I don't think this is related to the graphics driver as I am using the generic Ubuntu driver and have this issue. In fact, I dual boot Ubuntu and in Ubuntu Studio 11.10 this bug does not occur, but in standard Ubuntu 11.10 uprgraded from 11.04 I get this bug.

Shutdown bugs seem really hard to track down as logging is tunred off before the bug occurs and the damn Plymouth screen kicks in hiding a lot of the shutdown messages.

I have noticed by killing LightDM I can sometimes see some more of the shutdown messages and it is clear that this error is because a process is failing to shutdown successfully, preventing the pc from shutting down. I did once see an error message saying lightDM didn't shutdown, but that was only once....