Lucy O'Neill's a genius. Her fix worked for me. I'm running a Dell Inspiron 1720 with an NVidia card. Here's what I did
gksudo gedit /etc/default/grub
Replaced e the line GRUB_CMDLINE_LINUX="" with GRUB_CMDLINE_LINUX="acpi=on" and saved the file
sudo update-grub
Rebooted (I had to hold the power button)
Shutdown (Did not have to hold the power button)
Lucy O'Neill's a genius. Her fix worked for me. I'm running a Dell Inspiron 1720 with an NVidia card. Here's what I did
gksudo gedit /etc/default/grub
Replaced e the line GRUB_CMDLINE_ LINUX=" " with GRUB_CMDLINE_ LINUX=" acpi=on" and saved the file
sudo update-grub
Rebooted (I had to hold the power button)
Shutdown (Did not have to hold the power button)