I have an ASUS Pro50N, the issue (restart and shutdown hang, standby was
OK for me) was present for me in Ubuntu 11.04 and also after clean
install of 11.10, resolved in both cases by doing the following:
1. Open Terminal
2. Edit grub menu
sudo gedit /etc/default/grub
3. Edit the line "GRUB_CMDLINE_LINUX_DEFAULT=" to be:
GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi=force"
4. Close and save the file and run:
sudo update-grub
This issue detailed at http://ubuntuforums.org/showthread.php?t=1466589&page=6
- along with links to resolving this issue by blacklisting bad Nvidia drivers
which worked for some users.
I know this fix does not work for all instances of this issue but hope it helps
some users while the bug is worked out.
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https://bugs.launchpad.net/bugs/762203
Title:
Computer is not turned off at shutdown
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