NVIDIA and Plex server issue. Graphical corruption

[new666uk]

Ok, so I have tried again today and still have the graphic glitches issue shown above having done the following, mainly using https://www.baeldung.com/linux/nvidi...st-install-run as a guide.

1.Physically removed GPU
2. Removed preinstalled nvidia drivers with:

$ sudo apt purge nvidia*​

and

$ sudo apt autoremove​

Checking in driver manager, no additional drivers are listed.

3. installed dependencies:

$ sudo apt install build-essential gcc-multilib dkms​

4. blacklisted the Nouveau driver with:

$ cd /etc/modprobe.d
$ sudo touch blacklist-nouveau.conf
$ sudo nano blacklist-nouveau.conf
blacklist nouveau
options nouveau modeset=0​

5. Tried to stop the display manager using but I'm not sure it worked:

sudo systemctl stop kdm​

6. From the download folder I then ran:

$ sh NVIDIA-Linux-x86_64-580.159.04.run​

7.0 Re-installed GPU and booted up

This boots up using the nvidia card and I can see that I'm using the manually installed driver. The kubuntu default ones (535, 580 etc) are shown in the list.

I'm completely lost on why I'm having corrupted graphics all of a sudden. Can someone help me trouble shoot what is causing that?

[Schwarzer Kater]

Just two thoughts (and nothing concrete regarding your graphics glitches):

1. This

[…]
5. Tried to stop the display manager using but I'm not sure it worked:

sudo systemctl stop kdm​

[…]

will not stop anything, because Kubuntu uses SDDM since Plasma 5.
See
sudo systemctl list-units | grep -i kdm
or
sudo systemctl status sddm.service

I am also not quite sure why one would stop the display manager for this - does ubuntu-drivers also do it for an NVIDIA driver installation?


2. Installing third-party drivers from a website can pose a (functional) risk; it can be assumed that Canonical does not test the driver from the NVIDIA website but - assuming extensive testing is done at all - only the one from its own package repositories.
Furthermore, you could miss updates for such drivers and will have to install them manually every time.
Reasons why I always used the NVIDIA driver for *Ubuntu from the Ubuntu repos, the one for openSUSE from the openSUSE repos, the one for Debian from the Debian repos, the one for…
Just saying.

[new666uk]

Thanks. I've a feeling I might just invest the time in a fresh install. The two things that put me off are having to re-learn permissions for the various media drives and setup Plex. As it is, the machine is unusable for watching media on so I'm starting to think I've little choice.