This is what I get when I log out of X and run sddm
:~$ sddm
[04:28:22.147] (II) DAEMON: Initializing...
[04:28:22.154] (II) DAEMON: Logind interface found
[04:28:22.154] (II) DAEMON: Starting...
[04:28:22.155] (II) DAEMON: Adding new display on vt 1 ...
[04:28:22.155] (II) DAEMON: Loading theme configuration from ""
[04:28:22.155] (II) DAEMON: Display server starting...
[04:28:22.155] (II) DAEMON: Running: /usr/bin/X -nolisten tcp -auth
/var/run/sddm/{3029e4a4-8913-4abe-ac00-294e7375c132} -background none -noreset
-displayfd 17 -seat seat0 vt1
[04:28:22.157] (EE) DAEMON: Display server failed to start. Exiting
Aborted (core dumped)
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https://bugs.launchpad.net/bugs/1765923
Title:
Nvidia driver leads to black screen on bionic 18.04 SDDM LightDM bug?
Status in apt package in Ubuntu:
New
Status in nvidia-graphics-drivers-390 package in Ubuntu:
New
Status in sddm package in Ubuntu:
New
Bug description:
Using the April 19th daily build of Kubuntu 18.04 I installed the
Nvidia drivers via the following command.
sudo ubuntu-drivers autoinstall
The install process proceeds fine and after a logout process I get a
black screen. I tried this on the April 17th daily build of bionic
and a reboot also results in a black screen.
The following is a question which was submitted by a Ubuntu 17.10 user: QUOTE
After I installed latest Nvidia driver-390 and tried to boot after shutting
down once I faced a black screen problem. since, I'm a noob but something
related to nvidia drivers couldn't be started. Then I followed
https://askubuntu.com/a/968692/802490
While following these instructions re-installing of nvidia drivers failed.
The only things that worked is purging the drivers and changing
"WaylandEnable=false" in (/etc/gdm3/custom.conf). Now, I want to re-install
nvidia drivers again but I'm afraid that this will lead to that problem again.
Can anyone help in re-installing the driver such that I won't face that
problem? END QUOTE
THE WORK AROUND
Use Ctrl-Alt-f6 to get to a login prompt.
Login
run "startx"
The x server will start and Nvidia drivers will function.
THE PROBLEM
When I try to run SDDM I get an error (Which I will try to copy down to add
to this bug when I am on a different computer than the one I am reporting the
bug about.).
Installing lightDM does not work... it installs but is either will not
run or will not actually start a x session.
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