Hang up on shutdown from login screen (Laptop)

Try to edit the /boot/grub/menu.lst and add this kernel boot option
acpi=force

To do this, please open a Terminal from the menu Applications->Accessories->Terminal and type:

sudo gedit /boot/grub/menu.lst

give your user password when requested, you don't see nothing when you type it, then press enter.

Look for this row
# defoptions= ..... your already defined parameters...
change to
# defoptions= ..... your already defined parameters... acpi=force

Save and exit, then type:

sudo update-grub

then reboot you pc, type

sudo reboot

Hope this help

Thanks, but this did not fix my problem.

Perhaps I have not made myself entirely clear. I can shutdown / reboot normally from within my gnome session - but not from the login screen.

This page may help you:
http://ubuntuforums.org/showthread.php?s=d6674edbeb9983fdf4f1cc6374602e05&t=539544&highlight=shutdown+amilo

http://ubuntuforums.org/search.php?s=d6674edbeb9983fdf4f1cc6374602e05&searchid=31510010

http://ubuntuforums.org/showthread.php?s=d6674edbeb9983fdf4f1cc6374602e05&t=189540&highlight=shutdown+amilo

Or may be this bug:

https://bugs.launchpad.net/ubuntu/+bug/86981

or this

https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/39139

Hope this help

Thanks, I'll let you know when I've checked them out!! :)

editing:

/boot/grub/menu.lst

by changing splash to nosplash on my kernel line seems to fix the problem.

Which is fine for a temporary fix, and will do for the moment, but I want to look into the issue further and understand and resolve why a boot splash is preventing correct shut down.

OK, here's an update.

I've been away a while, as I've had intermittent hard disk issues. All ok now, and I've re-installed Ubuntu.

There are no more hang ups on shutdown - even with splash enabled.

As I had previously installed other themed logins when I experienced the problem, I believe that is where the issue was.

Oh, yeah - thanks for the help Marcobra! :)