Shutdown problem

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http://ubuntuforums.org – Hi, I'm using Mythbuntu 12.04 (although I had the same issue with 11.10 which is why I did a fresh install of 12.04 with db export/import). I have set it up with mythwelcome to shutdown when idle and start up for recordings according to: http://http://www.mythtv.org/wiki/ACPI_Wakeup For the most part it all works well. However, occassionally the system hangs when shutting down. The purple mythbuntu and animated red dots are displayed indefinitely. I've tried just leaving it but it doesn't shutdown. The shutdown command used is sudo shutdown -Ph now. As I said auto shutdown/wakeup wo (Hardware)