Ran Talbott via tde-users composed on 2023-07-11 07:00 (UTC):
Running R14.0.12 on Ubuntu 20.04
I have two 1920x1080 monitors that I use as one 3840x1080 X screen. On startup, TDM has the left and right monitors "swapped". I can manually rearrange them once I'm logged in, but that's annoying. Especially because the configuration program does something weird to the color map on one monitor, so I have to logout and log back in.
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If you have some experience with this, please let me know;
Most PCs I have support 2, 3 or 4 screens at once, and I usually use most of them that way. All are multi-multiboot. So the following instruction is for Debian and its derivatives. For Fedora, Mageia and openSUSE the location I use is /etc/X11/xinit/xinitrc.d/.
a. whether TDM will freak out if I do an xrandr in the middle of login b. how much of an x configuration I need to create to position the monitors, or c. whether there's a TDM config file I can fiddle to make it arrange the monitors.
In /etc/X11/Xsession.d/, create a file. Its name shouldn't matter, but I'd start its name with a digit like 4, 5 or 6. While you're in that location, scan its content to be sure there isn't already a file there that employs xrandr. If there is, you may want to edit it instead of creating a new file. Use inxi -Gaz or xrandr to determine the name X uses for your two displays. If it was DP-1 on the right with Kicker and DP-2 on the left and you want them swapped, the file content would be:
xrandr --output DP-2 --primary --output DP-1 --right-of DP-2
This location for xrandr will run as your TDE session starts. It won't affect TDM. If you want TDM affected, there's /etc/trinity/tdm/tdmrc's GreeterScreen= for designating on which to put the greeter.
The above xrandr template should be safe to rerun at any time, but if your screens were not matched resolutions, using it to make a switch may move the Kicker elsewhere than where it belongs until logging out and back in. Assign a hotkey to your script or to a copy of it to make it easy to run/rerun at any time should it become necessary or desirable.