Comment 95 for bug 1778011

@Andrew, @Alberto: Looks like many Thinkpad X1 Extreme users are reporting the same issue where prime-select seems to work but does not power of the nvidia card nor shows up in nvidia-settings. I followed the instructions the same way Andrew did and got the same 'not found' message. I assumed the packages are in updates by now and we should all have them anyway. Apt tells me that 390.77-0ubuntu0.18.04.1 is the newest version. Am I missing something? I have the same issue as I had before (NVIDIA GTX 1050 TI). Thanks for your help.