The nopti switch is working for me with 4.15.0-51-generic.
I think possibly the mitigations=off was not working for me because I positioned it at the wrong part (the end) of the linux arguments list. I put nopti closer to the front of the arguments list.
The nopti switch is working for me with 4.15.0-51-generic.
I think possibly the mitigations=off was not working for me because I positioned it at the wrong part (the end) of the linux arguments list. I put nopti closer to the front of the arguments list.