Sddm and /usr/share

Help
1

The last time I used KDE, according to my notes, I set sddm’s resolution and refresh rate by putting kscreen-doctor output.HDMI-A-1.mode.3840x2160@120 in /usr/share/sddm/scripts/Xsetup.

How can I do the same in NixOS where this path doesn’t exist?

So far I’ve tried the following in my configuration.nix (which I stumbled upon here):

services.xserver.displayManager.setupCommands = "kscreen-doctor output.HDMI-A-1.mode.3840x2160@120";

and

services.displayManager.sddm.setupScript = ''
kscreen-doctor output.HDMI-A-1.mode.3840x2160@120
'';

But so far no luck.

2

Playing around some more I have tried putting the path of kscreen-doctor to /run/current-system/sw/bin/kscreen-doctor and also /usr/bin/env kscreen-doctor.

I have also played around with quotation marks for services.xserver.displayManager.setupCommands and have confirmed that it runs the commands.

I’ve tried some xrandr stuff in ~/.xprofile that also didn’t work.

Still no luck

3

Running out of ideas now. I tried setting the following, but that just boots me to the terminal :frowning:

 services.displayManager.sddm.settings = {
   General = {
     DisplayServer = "wayland";
   };
 };
4

I’m starting to think this has all been a big wild goose chase.
I logged into KDE with X11 instead of Wayland and setting the refresh rate with either xrandr, display settings, og nvidia settings - it SAYS the refresh rate is 120hz, but moving the mouse I can tell right away that it’s 60hz or below.

I wonder why…

Anyway, if anyone wants to chime in I’d be very interested, but I’ll mark this as solved for now.

5

Are you using an nvidia chip, and perhaps the stable driver?
I’m doing that and ATM suspend/resume is kind of broken in that the latency after resume is measured in 10s (!) of seconds, so unlocking is… Let’s call it a hassle. It’s not, but let’s call it that.

So for now I just make sure the system doesn’t suspend.