Hires Login Screen in Kubuntu 24.10

[aaswnw]

Hi, it's my first post on Kubuntu Forums so I'd like to introduce myself.

I'm new Kubuntu 24.10 user - only several days but quite old Ubuntu user. I'm fighting with annoying problem.My login screen is in high resolution so the small window where the password should be write is small and the fonts I have to put are tiny, almost unreadable. I tried several solutions from the net without success. For example kde_settings.conf modification, changing font size, use GDM settings. Probable like a newbie I make simple mistake and I can't correct them. Can you help me?
I tried switch to gdm3 and screen resolution was OK, but ubuntu look as always doesn't impress me and there are troubles after login so I returned to SDDM.

aaswn

[ralfheinz]

I was struggling with the same problem for a long time too. Finally the solution was quite easy, in my case on 24.4 with X11, it won’t work with Wayland:

First find out your screen name and its current settings after the login (supposing they are okay for you):

$ xrandr
Screen 0: minimum 320 x 200, current 4240 x 1440, maximum 16384 x 16384
eDP-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   2880x1800     59.99 +
   [...]  
   1600x1200     59.99  
   1680x1050     59.99*
   1400x1050     59.99  
   [...]
   320x180       59.99

The output will be a lot more lines, the interesting one is marked with an asterix *, in my case screen name eDP-1, resolution 1680x1050 and refresh rate 59.99.

Now open /usr/share/sddm/scripts/Xsetup (backing it up before is a good idea) and add this line (with your parameters of course) to it:

xrandr --output eDP-1 --mode 1680x1050 --rate 59.99

Log out and log in again, then everything should be fine (hopefully). Good luck!

[claydoh]

SDDM runs under a standalone xorg session by defualt no matter what your desktop session is, at least I almost 100% positive it still does .

You should also be able to use System Settings to try and apply desktop settings, which *should* match the resolution and scaling/dpi if the resolution edit alone does not do anything.