Affects me as well. Dell Precision M6600 64 bit Ubuntu 11.04 Ubuntu 11.10
The laptop was on bios A03 which I updated to A07 and disabled "c state control" in bios after a few attempts but still no joy. Removing the AC connector before issuing the shutdown command within gnome did allow for a clean power down. Later, I stopped acpi-support but left AC connected and the system also successfully powered down. I'm currently running 64 bit 11.04. I'd consider going back to 10, but it EOL next month. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/882817 Title: shutdown screen stuck after upgrade to Ubuntu 11.10 Status in Ubuntu: Invalid Status in “network-manager” package in Ubuntu: Triaged Bug description: After the update from 11.04 to 11.10: when I shut down the pc sometimes it goes back to the login screen and then I have to do shutdown there which works well then. Sometimes the pc shuts down but ends with the ubuntu splash screen and gets stuck there. The issue may be driver related: I use the AMD/ATI FGLRX graphics driver. I have a second pc where I also did the update to 11.10 and there I have no problem at all but I don't use the above driver but the NVIDIA graphics driver. Both pc's have Ubuntu 11.10 64-bit. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/882817/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp