This issue looks like a problem related to ACPI instead of gnome-power- manager. Have you tried to run some instructions from https://wiki.ubuntu.com/DebuggingACPI? Thanks in advance.
** Changed in: gnome-power-manager (Ubuntu) Status: New => Incomplete -- When shutting down computer does not turn off https://bugs.launchpad.net/bugs/446852 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs