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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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On a dual monitor setup, how to set which display is the default for the Logon prompt in SDDM ? (lemmy.ml)

submitted 1 month ago by mub@lemmy.ml to c/linux@lemmy.ml

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I'm using EndeavourOS (Arch btw) with KDE plasma 6.x (Wayland), SDDM, and systemd as boot manager. I have 2 displays, one HDMI-A-1 (1080p) and one on DP-1 (Ultrawide).

When I boot the password entry cursor defaults to the HDMI display, but I want it to default to the DP-1 display.

I've tried a few things, mostly suggestions from ChatGPT. But nothing has worked. The weird thing is at boot the boot menu and boot messages all appear on DP-1, and it is set as primary in KDE and that works fine as well. It is just the logon prompt that defaults to the wrong display.

Things I've tried so far.

Adding video=DP-1:e to the options in the systemd entry - (No effect)
Edited /etc/sddm.conf.d/wayland.conf to run a script that did the following: kwriteconfig6 --file startkderc --group General --key PrimaryScreen DP-1 (didn't fix it, actually broke the logon process so had to remove it)

I'm just not familiar enough with how SDDM works so hoping for some good pointers to provide the answer or point me in the right direction.

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[–] Max_P@lemmy.max-p.me 4 points 1 month ago (3 children)

In theory it should be on all monitors. At least on mine, all 3 monitors display the login screen and any of them can be used to input the password.

You can edit the settings from KDE's settings to copy the KWin monitor configuration to it, you probably want to set the primary display.

[–] mub@lemmy.ml 3 points 1 month ago* (last edited 1 month ago) (2 children)

The prompt screen is the same on both monitors. But the typing cursor is in the password box on the secondary monitor.

I had a go at setting the kwin primary using another method but I'll have a look at copying the settings across like you said.

[–] Max_P@lemmy.max-p.me 2 points 1 month ago (1 children)

If just follows the cursor so if you move the mouse to another screen you can also input your password there.

The only difference is which one the mouse cursor is on initially.

[–] mub@lemmy.ml 3 points 1 month ago

Interesting. That's not what happens on mine. I have to actually click into the password box on the primary screen if I want to use that one. Password entry works on both screens so doesn't really matter which I use, it is just a cosmetic thing that bothers me.