Public bug reported:

This is to track 
https://bugzilla.gnome.org/show_bug.cgi?id=787207 " gdm & nvidia with modeset=1 
causes loop, does not launch greeter "

I don't know if this is an nvidia bug or a gdm3 bug but it requires both
to reproduce.


[reply] [−] Description t...@tim-richardson.net [reporter] 2017-09-03 10:46:21 
UTC
Created attachment 359016 [details]
syslog

reproduced on two Thinkpad laptops with bios set to Discrete graphics.
In this mode, the integrated Intel graphics is bypassed by a hardware
mux and the machines appears to have only Nvidia graphics.

Environment is Ubuntu 17.10 development version, pre-release packages
One laptop has Quadro 1000M, the other Quadro M1000M. Both cards are supported 
by the latest Nvidia drivers. 

Nvidia driver 375 or 384 (as packaged by Ubuntu)
/etc/modprobe.d/zz-nvidia.conf has
options nvidia_384_drm modeset=1

and after that setting 
sudo update-initramfs -u

This problem does not occur when 
lightdm is used in instead of gdm3
or
modeset=1 
is not deployed.

The session attempted to launch is either gnome or the new "ubuntu"
desktop session, which is gnome

The boot process fails.Sometimes there is just black screen (and high
CPU activity driving the fans) and sometimes there is a message about
NVIDIA persistence daemon starting and stopping, as well as gdm
messages.

I mounted the filesystem after a crash, and I attach syslog.

In the attached syslog, search for persistenced to see messages like
this

Sep  2 12:42:15 tim-ThinkPad-W520 org.gnome.Shell.desktop[1206]: Window manager 
warning: Failed to create renderer: Failed
 to initialize renderer: Missing extension for GBM renderer: 
EGL_KHR_platform_gbm, Failed to find matching EGLDeviceEXT
 Sep  2 12:42:15 tim-ThinkPad-W520 gnome-shell[1206]: Failed to create backend: 
Failed to create MetaRenderer
 Sep  2 12:42:15 tim-ThinkPad-W520 systemd[1]: Starting NVIDIA Persistence 
Daemon...
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: Verbose syslog 
connection opened
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: Now running with user 
ID 123 and group ID 131
 Sep  2 12:42:15 tim-ThinkPad-W520 systemd[1]: Started NVIDIA Persistence 
Daemon.
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: Started (1237)
 Sep  2 12:42:15 tim-ThinkPad-W520 gnome-session[1196]: 
gnome-session-binary[1196]: WARNING: App 'org.gnome.Shell.desktop'
 exited with code 1
 Sep  2 12:42:15 tim-ThinkPad-W520 gnome-session-binary[1196]: WARNING: App 
'org.gnome.Shell.desktop' exited with code 1
 Sep  2 12:42:15 tim-ThinkPad-W520 gnome-session-binary[1196]: Unrecoverable 
failure in required component org.gnome.Shell.
 desktop
 Sep  2 12:42:15 tim-ThinkPad-W520 systemd-networkd-wait-online[536]: ignoring: 
lo
 Sep  2 12:42:15 tim-ThinkPad-W520 systemd[1]: Stopping NVIDIA Persistence 
Daemon...
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: Received signal 15
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: PID file unlocked.
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: PID file closed.
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: The daemon no longer 
has permission to remove its runtime data
 directory /var/run/nvidia-persistenced
 Sep  2 12:42:15 tim-ThinkPad-W520 nvidia-persistenced: Shutdown (1237)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1714881

Title:
  no  gdm3 greeter with nvidia quadro and modeset=1

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