ecolss/nvidia_driver_issues.txt

## nvidia_driver_issues.txt
The problem,
- PC was running 20.04 LTS, and one day PC can't shut down properly, had to manually force the shutdown (pressing the power btn).
- After that, PC lost nvidia-driver stuff (nvidia-smi can't work anymore), so need to reinstall drivers.
- The frustrating part is, tried so many different tutorials/versions, none worked. (e.g. apt update/upgrade/purge/remove/install whatever can be found online)

The fix,
- At last, decided to upgrade ubuntu to 22.04 LTS, and then simply `$ sudo apt install nvidia-driver-535`, reboot and done.
- One key reason why decided to upgrade is, all apt solutions tried are blocked by glibc version requirement (higher libc6 version is needed, but on 20.04 seems no such versions).
	The problem,
	- PC was running 20.04 LTS, and one day PC can't shut down properly, had to manually force the shutdown (pressing the power btn).
	- After that, PC lost nvidia-driver stuff (nvidia-smi can't work anymore), so need to reinstall drivers.
	- The frustrating part is, tried so many different tutorials/versions, none worked. (e.g. apt update/upgrade/purge/remove/install whatever can be found online)

	The fix,
	- At last, decided to upgrade ubuntu to 22.04 LTS, and then simply `$ sudo apt install nvidia-driver-535`, reboot and done.
	- One key reason why decided to upgrade is, all apt solutions tried are blocked by glibc version requirement (higher libc6 version is needed, but on 20.04 seems no such versions).