I am running Ubuntu 14.04 on my Lenovo Thinkpad T530. I noticed that if I suspend the laptop at some point, the next shutdown will instead cause a restart.
It seems that I am not alone with this (and many other questions), and I tried most solutions I could find, but nothing worked.
So far the best (or only) working solution was to boot with
acpi=noirq. This fixes the issue, but then suspending the laptop doesn't lock it. There may be other side-effects which I haven't found as I don't understand the implications of this kernel parameter.
acpi=noirq do, exactly? How can I lock the computer on suspend? Is there another solution?
Things I have tried:
sudo ethtool -s eth0 wtol d(no effect)
sudo apt-get install laptop-mode-tools(doesn't shut down correctly anymore at all)
- Deactivating "Wake On LAN" in my BIOS (no effect)
- Try to shut down with
sudo shutdown nowand similar (no effect)