I managed to resolve this problem. Here I will describe the steps and
errors I did and/or occurred:
1. I added the NVIDIA drivers PPA: ppa:graphics-drivers/ppa which caused to
install a new non-
distro free version of my current driver: from 418.56 to 418.67.
2. The new driver version included new dependencies that caused X-Org to crash
when trying to use
NVIDIA for processing the screen.
3. In addition, the new installation created non-valid "xorg.conf" which
caused, again, X-Org
crashing when trying to log-in either boot screen.
The solution:
1. Remove both NVIDIA drivers PPA and CUDA ones from "sources.list" and/or
"sources.list.d".
2. Uninstall both "mesa drivers" and "gstreamer":
$ sudo apt remove mesa-va-drivers gstreamer1.0-vaapi
[REBOOT]
3. Completely delete "/etc/X11/xorg.conf" which contains invalid configuration.
4. Remove new NVIDIA drivers and libraries in order to install the "older"
(but working) ones.
$ sudo apt remove --purge nvidia-*
$ sudo apt remove --purge libnvidia*
$ sudo apt remove --purge *nvidia*
$ sudo apt remove --purge *cuda*
I removed that all because of new dependencies installed in order to avoid
versions' compatibility errors when trying to install the recommended drivers.
[REBOOT]
5. Install recommended drivers with:
$ sudo ubuntu-drivers autoinstall
[REBOOT]
6. Boot again into Ubuntu and log-in normally, checked "nvidia-smi" and got
working configuration:
$ nvidia-smi
Sat Jun 15 17:25:18 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 418.56 Driver Version: 418.56 CUDA Version: 10.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 950M Off | 00000000:01:00.0 Off | N/A |
| N/A 43C P8 N/A / N/A | 750MiB / 2004MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1207 G /usr/lib/xorg/Xorg 24MiB |
| 0 1431 G /usr/bin/gnome-shell 48MiB |
| 0 1693 G /usr/lib/xorg/Xorg 120MiB |
| 0 1878 G /usr/bin/gnome-shell 460MiB |
| 0 2137 G /usr/bin/nextcloud 2MiB |
| 0 2641 G ...-token=671EE9C10F25860492D3CA477A4C4162 5MiB |
| 0 2690 G ...quest-channel-token=4068114528266404073 7MiB |
| 0 2702 G ...uest-channel-token=18369271805930189070 33MiB |
| 0 3188 G ...quest-channel-token=6098888096153109739 5MiB |
| 0 3304 G ...quest-channel-token=5873873380325413621 38MiB |
+-----------------------------------------------------------------------------+
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https://bugs.launchpad.net/bugs/1832935
Title:
NVIDIA driver 418.67 - Ubuntu 19.04
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