Comment 79 for bug 762203

I have finally resolved this issue after update to 11.10. This is Dell e6410.

The update via Update Manager didn't work for me as mentioned before so I tried a clean reinstall. Fortunately, Ubuntu installer is able to keep all configuration from home dir a also to reinstall most of previously installed packages so the reinstallation was really not that painful.

After this process, everything works as it should. Turn on/turn off and even suspend in memory and hibernation.

After coming through this I suppose that shutdown error has to do something with configuration in /etc not updating correctly when system was updated from 10.10 to 11.04.

I suggest everyone suffering from this issue to try clean reinstall and see if that works for you.