SDDM is not respecting resolution

Support Graphics & Display
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1

Hi,
When I edit the display resolution, the SDDM is not respecting it and still very small.
I tried (SDDM apply plasma settings), but it didn’t work.
I also tried (Enable HiDPI), but nothing happened.

Furthermore, I actually had the same issue when I was using vanilla arch and I fixed it, but I don’t remember the solution.

This is my system https://i.imgur.com/2OgzCbG.png
I am using Nvidia card with 470xx driver.

Thanks in advance.

2

I note that the archwiki page mentions…

Note: Since sddm version 0.20.0, HiDPI support is enabled by default, and the following step is not necessary.

https://wiki.archlinux.org/title/SDDM#Enable_HiDPI

Do you use Plasma Wayland or Plasma X11?

When using a Wayland compositor at least, there are some additional notes in that page that may be of value.

3

Create a sddm configuration drop-in file /etc/sddm.conf.d/enable-hidpi.conf

[Wayland]
EnableHiDPI=true

[X11]
EnableHiDPI=true
4

Thank you so much for all your help.
I found this fix that worked perfect for me.
I can’t add a link in the reply, so the fix is navigating to

/usr/share/sddm/scripts/Xsetup

and adding this line

xrandr --output “device” --mode “mode” --rate "rate”

after changing the device and rate from xrandr in terminal.

5

Which will get overwritten on updates to sddm.

Instead of using the distribution file - you should create your own as described in man ssdm.conf

DisplayCommand=
Path of script to execute when starting the display server. The script will be executed as root when General.DisplayServer is “x11”, otherwise as sddm user. Default value is “/usr/share/sddm/scripts/Xsetup”.

The configuration is similar for Wayland

Place a dropin file in /etc/sddm.conf.d with your script

 $ cat /etc/sddm.conf.d/00-display-command.conf
[X11]
DisplayCommand=xrandr --output “device” --mode “mode” --rate "rate”

[Wayland]
DisplayCommand=xrandr --output “device” --mode “mode” --rate "rate”

Or you could create an override using /etc/sddm/scripts/Xsetup

sudo mkdir -p /etc/sddm/scripts

Then create the override script

echo xrandr --output “device” --mode “mode” --rate "rate” | sudo tee /etc/sddm/scripts/Xsetup
6

Thank you so much for your reply.
I tried both of the methods, but nothing works fine.

Is there anything I can do for it??

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