The external monitor is not being recognized at all. I’ve been all over this and other forums, and have gotten the external monitor to be recognized, but never usable. I could see the mouse on a black screen. My laptop main screen always works just fine. I also see the issue with the nvidia-smi command not communicating with the NVIDIA driver. Currently running nvidia-driver-470 in Ubuntu 18.04. The uname -r output is 5.4.0-80-generic. The nvidia bug report log is also attached. nvidia-bug-report.log.gz (182.8 KB)
I’ve tried a lot of different items on many forums with no luck. Any thoughts appreciated, thanks.
I found a solution. Running a
sudo apt purge nvidia-drivers-*
brought monitor back to being seen by the OS, but still not used right. The issue is that I had set the default gcc to be 5.5. I finally noticed that during installation of the nvidia-driver-470 (in my case) was running into an error building the kernel modules. I found here
that gcc must be version 7. So I set the gcc with
sudo update-alternatives --config gcc
to gcc-7, reinstalled the nvidia-driver-470, restarted, and all is well again.