GDM and Mulitseat requiring an initial logout or systemctl restart

Okay, trying to get gdm to work with a Multiseat configuration. The issue is getting the gdm login to work correctly.

  • When I first boot up the computer gdm only shows the login screen on one terminal of the multiseat configuration.

  • If I logout or perform a “systemctl restart gdm” then both seats get the login screen.

  • But if after that I logout from the second seat then I get booted out of both seats (like a systemctl restart gdm). Also I loose the login screen for the second seat. Basically I return to the beginning…

  • If I logout from seat0 then everything remains okay with the second seat until I logout from it.

  • After I logout from the second seat, and then I login back to the first seat and logout from the first seat (seat0), then I once again get the login screen on the second seat.

On the first boot up “systemctl status gdm” shows:

● gdm.service - GNOME Display Manager
Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2020-08-15 23:23:59 EDT; 37s ago
TriggeredBy: ● gdm.path
Process: 895 ExecStartPre=/usr/libexec/gdm-wait-for-drm (code=exited, status=0/SUCCESS)
Main PID: 896 (gdm)
Tasks: 4 (limit: 77002)
Memory: 81.8M
CGroup: /system.slice/gdm.service
└─896 /usr/bin/gdm

Aug 15 23:24:20 clr-joshuamy gdm-password][1543]: pam_unix(gdm-password:session): session opened for user admin by (uid=0)
Aug 15 23:24:20 clr-joshuamy gdm-password][1543]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring
Aug 15 23:24:22 clr-joshuamy gdm[896]: Child process -961 was already dead.
Aug 15 23:24:22 clr-joshuamy gdm[896]: GdmDisplay: Session never registered, failing
Aug 15 23:24:22 clr-joshuamy gdm[896]: Child process -1156 was already dead.
Aug 15 23:24:22 clr-joshuamy gdm-Xorg-:0[944]: (II) event13 - Logitech M705: device removed
Aug 15 23:24:22 clr-joshuamy gdm-Xorg-:0[944]: (II) event14 - Logitech MK700: device removed
Aug 15 23:24:22 clr-joshuamy gdm-Xorg-:0[944]: (II) UnloadModule: “libinput”
Aug 15 23:24:22 clr-joshuamy gdm-Xorg-:0[944]: (II) UnloadModule: “libinput”

_____________________-
After I performed a logout and reglogin (getting both seats to now show up the gdm login screen) I get the following from a “systemctl status gdm”:

● gdm.service - GNOME Display Manager
Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2020-08-15 23:23:59 EDT; 6min ago
TriggeredBy: ● gdm.path
Process: 895 ExecStartPre=/usr/libexec/gdm-wait-for-drm (code=exited, status=0/SUCCESS)
Main PID: 896 (gdm)
Tasks: 46 (limit: 77002)
Memory: 134.9M
CGroup: /system.slice/gdm.service
├─ 896 /usr/bin/gdm
└─2757 /usr/bin/X :1 -background none -noreset -verbose 3 -logfile /dev/null -auth /var/run/gdm/auth-for-gdm-7TSMP0/database -seat seat1 -nolisten tcp

Aug 15 23:29:41 clr-joshuamy gdm-Xorg-:1[2757]: (II) AMDGPU(0): Modeline "1280x960"x0.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz e)
Aug 15 23:29:41 clr-joshuamy gdm-Xorg-:1[2757]: (II) AMDGPU(0): Modeline "1024x768"x0.0 94.50 1024 1072 1168 1376 768 769 772 808 +hsync +vsync (68.7 kHz e)
Aug 15 23:29:41 clr-joshuamy gdm-Xorg-:1[2757]: (II) AMDGPU(0): Modeline "800x600"x0.0 56.25 800 832 896 1048 600 601 604 631 +hsync +vsync (53.7 kHz e)
Aug 15 23:29:41 clr-joshuamy gdm-Xorg-:1[2757]: (II) AMDGPU(0): Modeline "640x480"x0.0 36.00 640 696 752 832 480 481 484 509 -hsync -vsync (43.3 kHz e)
Aug 15 23:29:41 clr-joshuamy gdm-Xorg-:1[2757]: (II) AMDGPU(0): Modeline "640x400"x70.0 23.35 640 656 720 800 400 401 404 417 -hsync +vsync (29.2 kHz e)
Aug 15 23:29:53 clr-joshuamy gdm-password][3525]: gkr-pam: unable to locate daemon control file
Aug 15 23:29:53 clr-joshuamy gdm-password][3525]: gkr-pam: stashed password to try later in open session
Aug 15 23:29:53 clr-joshuamy gdm-password][3525]: pam_unix(gdm-password:session): session opened for user admin by (uid=0)
Aug 15 23:29:53 clr-joshuamy gdm-password][3525]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring
Aug 15 23:29:56 clr-joshuamy gdm[896]: Child process -2768 was already dead.

Can anyone help me understand how to correct this behavior. Also a more general question is simply is this the right forum for this question, or should I simply file it as a “bug”

You may have some trouble finding help with this, as it’s a fairly uncommon use case and desktop use is “not in active development”.

However if you post the steps you took to get where you’re at, I’ll try to get it working and share my findings.