Please:
1. Tell us what Ubuntu version you are using.
2. Try ShowLocalGreeter=false and if that works then this would be bug
1895420
** Package changed: gdm (Ubuntu) => gdm3 (Ubuntu)
** Changed in: gdm3 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2021987
Title:
The gnome session doesn't work when connected via XDMCP
Status in gdm3 package in Ubuntu:
Incomplete
Bug description:
I used following setup:
1. The login screen is handled by gdm3.
2. The wayland is disabled for gdm3 and xdmcp is enabled:
[xdmcp]
# Enable XDMCP. This is important for using VNC.
Enable=true
Port=177
[daemon]
# Uncomment the line below to force the login screen to use Xorg
WaylandEnable=false
3. I'm using tigernvc server, that connects via xdmcp to the xorg and
exposes me login screen (I followed:
https://wiki.archlinux.org/title/TigerVNC#Running_Xvnc_with_XDMCP_for_on_demand_sessions)
document for that.
That setup worked for me very well. And since some time (unfortunately
I'm not able to say when), instead of GDM login screen I get black
screen. I'm not able to see login screen, and nothing happens.
I tried to change gdm3 to lightdm3. This somehow improved situation.
I'm able to see lightdm and login, but if I chose gnome session -
screen gets all black after login. For testing, I installed openbox.
Selection of openbox as session helped - I was able to use openbox
normally, via tigernvc client.
I tried to check logs (using journalctl --follow) when I starting new
session. I haven't found anything really weird, but this is something
that I see only for "failed" remote sessions:
maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania
maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania
maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania
maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania
maj 31 16:31:25 pecet gsd-color[36841]: Przekroczono czas oczekiwania
maj 31 16:31:25 pecet gsd-color[36841]: failed to obtain
org.freedesktop.color-manager.create-profile auth
(Przekroczono czas oczekiwania => The waiting time has been exceeded
(timeout)
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