Public bug reported:

After upgrade to kinetic I can't start Gnome Desktop under Wayland.

Until recent update to the gdm3,trying to start gdm3 with
"WaylandEnable=true" in /var/gdm3/custom.conf lead to blank screen with
non-blinking underscore sign in top left corner of the screen (with x11
gdm3 working fine).  Now the gdm3 starts well, but trying to log into
"Ubuntu on Wayland" leads to the blank screen with the underscore. The
computer remains bootable, no obvious error messages are IMHO present in
/var/log/syslog, dmesg .  After around a minute the PC comes back to the
gdm3.  The PC can boot into "Ubuntu" which means X11.

There are lots od "modeset errors" related to the nvidia driver. Those
were present in 22.04, and AFAIK are just a nuissance.

In 22.04 Gnome desktop via Wayland worked fine, so this is a regression.
I tried to log in to a new user with empty $HOME, but this changes
nothing.

I am happy to attach additional logs upon request.


The attached syslog is for a single boot of the computer that:
- was started with WaylandEnable=true
- was booted into Ubuntu on Wayland (time 14:45:13 in the file), experiencing 
blank screen
- at 14:46:50  the timout is triggered and "gnome desktop through Wayland" 
shuts itself down

It seems the line:
Oct  9 14:46:45 testosteron systemd[22999]: org.gnome.Shell@wayland.service: 
start operation timed out. Terminating.

is very closely tied to my issue, but google does not find anything
similar, so I was unable to investigate further.


----- extra info -----------
Description:    Ubuntu Kinetic Kudu (development branch)
Release:        22.10

mutter:
  Installed: 43.0-1ubuntu1
  Candidate: 43.0-1ubuntu1
  Version table:
 *** 43.0-1ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu kinetic/universe amd64 Packages
        100 /var/lib/dpkg/status


------ nvidia dirvers -----------
dpkg -l nvidia* | grep ii :

ii  nvidia-compute-utils-515        515.65.01-0ubuntu3          amd64        
NVIDIA compute utilities
ii  nvidia-driver-515               515.65.01-0ubuntu3          amd64        
NVIDIA driver metapackage
ii  nvidia-kernel-common-515        515.65.01-0ubuntu3          amd64        
Shared files used with the kernel module
ii  nvidia-kernel-source-515        515.65.01-0ubuntu3          amd64        
NVIDIA kernel source package
ii  nvidia-prime                    0.8.17.1                    all          
Tools to enable NVIDIA's Prime
ii  nvidia-settings                 510.47.03-0ubuntu1          amd64        
Tool for configuring the NVIDIA graphics driver
ii  nvidia-utils-515                515.65.01-0ubuntu3          amd64        
NVIDIA driver support binaries

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: mutter 43.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.19.0-19.19-generic 5.19.7
Uname: Linux 5.19.0-19-generic x86_64
NonfreeKernelModules: nvidia_modeset zfs zunicode nvidia zavl icp zcommon 
znvpair
ApportVersion: 2.23.1-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct  9 14:48:35 2022
EcryptfsInUse: Yes
SourcePackage: mutter
UpgradeStatus: Upgraded to kinetic on 2022-10-06 (2 days ago)
mtime.conffile..etc.apport.crashdb.conf: 2021-05-03T18:07:38.595923

** Affects: mutter (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kinetic

** Attachment added: "syslog.log"
   https://bugs.launchpad.net/bugs/1992285/+attachment/5622497/+files/syslog.log

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https://bugs.launchpad.net/bugs/1992285

Title:
  wayland does not start - blank screen with underscore for a minute

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