I’ve been running into an issue today where Ubuntu refuses to start and hangs on the boot screen. Dropping to the tty shell, I think this is because gdm fails, with the error shown in the picture.
So far, I’ve tried reinstalling my nvidia drivers and reinstalling my OS (I’ve done that 3 times) but each time, this issue reappears. I’m running a vanilla Ubuntu 23.04 install.
How can i fix this?
On Ubuntu 24.04 I faced the same issue. The answer given by alexbsti didn't work for me, perhaps because there is no ubuntu-session and xwayland installed on Ubuntu 24.04.
I switched to tty2 (Ctrl+Alt+2) and purged and reinstalled gdm3 and it fixed my problem:
sudo apt purge gdm3 sudo apt install gdm3 
sudo apt install gdm3 to get back the GUI : sudo systemctl restart gdm Found a solution- reinstalled ubuntu-session and it reinstalled xwayland and that seems to have fixed it. Found the solution here, in the last few comments: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2006590
Edit: As a followup, I recommend not running Wayland on NVidia Cards currently; the drivers are a bit of a mess in that regard.
I upgraded to 24.04 and have no display. I tried the purge/reinstall of gdm3 and it shows an error gdm.service is not active, cannot reload. invoke-rc.d: initscript gdm3, action "reload" failed. and does not fix the problem:
$ sudo apt install gdm3 Reading package lists... Done Building dependency tree... Done Reading state information... Done Suggested packages: libpam-pkcs11 The following NEW packages will be installed: gdm3 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 334 kB of archives. After this operation, 2,073 kB of additional disk space will be used. Get:1 http://us.archive.ubuntu.com/ubuntu noble/main amd64 gdm3 amd64 46.0-2ubuntu1 [334 kB] Fetched 334 kB in 1s (500 kB/s) Preconfiguring packages ... Selecting previously unselected package gdm3. (Reading database ... 214559 files and directories currently installed.) Preparing to unpack .../gdm3_46.0-2ubuntu1_amd64.deb ... Unpacking gdm3 (46.0-2ubuntu1) ... Setting up gdm3 (46.0-2ubuntu1) ... Creating config file /etc/gdm3/greeter.dconf-defaults with new version update-alternatives: using /etc/pam.d/gdm-smartcard-sssd-exclusive to provide /e tc/pam.d/gdm-smartcard (gdm-smartcard) in auto mode gdm.service is not active, cannot reload. invoke-rc.d: initscript gdm3, action "reload" failed. Processing triggers for dbus (1.14.10-4ubuntu4.1) ... Processing triggers for man-db (2.12.0-4build2) ... 