Comment 105 for bug 987220

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Lucy O'Neill (glassempire) wrote : Re: System does not power off reliably when "Shut Down" chosen from GUI

Hi again, just by accident found on some foreign ubuntu forum solution that might be checked out; i have to leave right now so cannot play with it - but if someone wants, feel free to try.
They say it's acpi issue and it has to be switched on in GRUB
GRUB_CMDLINE_LINUX="acpi=on"

sudo update-grub

they maintain that it works on Dell laptops