We recently upgraded our system from ubuntu 16.04 to 20.04. And after reinstalling nvidia-driver, the display stopped working - black screen after grub. I’m still able to ssh into the machine.
I can see the output of nvidia-smi and it does show the driver 515 and cuda 11.7 installed. However, the nvidia-persistenced.service shows it failed. I doubt it’s a permission problem because the ll -h /dev/nvidia* shows the permissions are 660. I tried to change the permission by adding options nvidia NVreg_DeviceFileMode=0666 in cat /etc/modprobe.d/nvidia.conf. But it doesn’t change anything. The permission stays as 660 forever.
Any help is appreciated!
The nvidia-bug-report is attached:
nvidia-bug-report.log.gz (1.0 MB)