Yet one more GDM3 Set Resolution question?

[Schorschi]

Yet one more GDM3 Set Resolution question? I am struggle with why this issue can be addressed in a structured and concrete manner. There are 100s of not 1000s of Google entries on this topic, and of the 10 to 20 odd methods I have tried, none work, or they just obviously can't work. So the question is, has anyone figured out how to get GDM3 (greeter) to honor the Xorg configuration, so screen resolution (i.e. size) is consistent between login and presentation of desktop.

Tried, Wayland disable, monitor.xml in setup, added xrandr commands to various script entry points, etc.

Any help appreciated.

Environment information...

# lsb_release -a
Distributor ID: Debian
Description: Debian GNU/Linux 9.4 (stretch)
Release: 9.4
Codename: stretch

# uname -a
Linux debian 4.9.0-6-amd64 #1 SMP Debian 4.9.82-1+deb9u3 (2018-03-02) x86_64 GNU/Linux

# cat /usr/share/X11/xorg.conf.d/10-amdgpu.conf
Section "OutputClass"
Identifier "AMDgpu"
MatchDriver "amdgpu"
Driver "amdgpu"

# randr
Screen 0: minimum 1 x 1, current 1280 x 1024, maximum 4096 x 4096
Virtual1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
800x600 60.00 + 60.32
2560x1600 59.99
1920x1440 60.00
1856x1392 60.00
1792x1344 60.00
1920x1200 59.88
1600x1200 60.00
1680x1050 59.95
1400x1050 59.98
1280x1024 60.02*
1440x900 59.89
1280x960 60.00
1360x768 60.02
1280x800 59.81
1152x864 75.00
1280x768 59.87
1024x768 60.00
640x480 59.94
Virtual2 disconnected (normal left inverted right x axis y axis)
Virtual3 disconnected (normal left inverted right x axis y axis)
Virtual4 disconnected (normal left inverted right x axis y axis)
Virtual5 disconnected (normal left inverted right x axis y axis)
Virtual6 disconnected (normal left inverted right x axis y axis)
Virtual7 disconnected (normal left inverted right x axis y axis)
Virtual8 disconnected (normal left inverted right x axis y axis)

[bw123]

I don't use it, but looking at it's pkg page I see in the list of files it has this...

https://packages.debian.org/stretch/amd64/gdm3/filelist
/usr/share/gdm/greeter/autostart/orca-autostart.desktop

So I would guess that an xrandr desktop file placed in /usr/share/gdm/greeter/autostart/ would run. Have you tried this? Also, I'd look at the documentation at /usr/share/doc/gdm3 instead of old internet posts. The changelog in particular might have some clues. There might be a way to "sync up" the greeter with the desktop, but that's not something I'd know, I don't really use a lot of gui stuff.

...has anyone figured out how to get GDM3 (greeter) to honor the Xorg configuration...

I don't see that you are doing any Xorg configuration, other than setting the driver, do you have any other .conf files present anywhere? Looks like it is in 1280, even though 800x600 is preferred. What resolution do you want?

[Wheelerof4te]

Why? Do you look at the login screen all the time?
Unless the GDM resolution is 640x480, you have nothing to worry about.