Arch Linux

xylphie

Member

Registered: 2024-02-13

Posts: 2

[SOLVED] RTX 3080 cannot find mode 5120x1440

Hello,

I was running my computer with onboard graphics for several months, but recently decided to get a GPU. My onboard graphics were able to support 5120x1440 just fine, and the xrandr monitor was listed as DisplayPort-0. Upon installation of my GPU, the resolution was automatically set to 3840x1080, and the xrandr monitor is now listed as None-1.
Trying to set the resolution using the following command gives this output

Nyaa% xrandr --output None-1 --primary --mode 5120x1440 --rate 120.00
xrandr: cannot find mode 5120x1440

Attempting to add the mode manually gives the following output

Nyaa% xrandr --addmode None-1 5120x1440_120.00
xrandr: cannot find mode "5120x1440_120.00"

The output of xrandr lists only one possible aspect ratio for this monitor

Nyaa% xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 4096 x 4096
None-1 connected 3840x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   3840x1080     60.00*+

It should be noted that I had a 4090 which only worked for a few days before failing, so it was returned, but it was able to support 5120x1440 just fine, so it shouldn't be any motherboard or CPU limitation if that's even a possibility.

I have what I believe to be the correct nvidia drivers installed according to the wiki

Nyaa% pacman -Q | grep -i nvidia
nvidia 545.29.06-18
nvidia-utils 545.29.06-3
opencl-nvidia 545.29.06-3

I found some reddit posts of people doing benchmarks on 5120x1440, so the card should be able to support this.

Any ideas on how I could approach this issue?
Thanks!

Last edited by xylphie (2024-02-14 18:06:43)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 21,831

Re: [SOLVED] RTX 3080 cannot find mode 5120x1440

The none device is the simpledrm garbage and not your nvidia card. Set up (early) KMS, make sure you set the parameter for nvidia-drm.modeset=1 on the kernel commandline and (optionally but good practice) add the nvidia modules to your initramfs: https://wiki.archlinux.org/title/NVIDIA … de_setting

xylphie

Member

Registered: 2024-02-13

Posts: 2

Re: [SOLVED] RTX 3080 cannot find mode 5120x1440

The none device is the simpledrm garbage and not your nvidia card. Set up (early) KMS, make sure you set the parameter for nvidia-drm.modeset=1 on the kernel commandline and (optionally but good practice) add the nvidia modules to your initramfs: https://wiki.archlinux.org/title/NVIDIA … de_setting

Yayy this worked. Thank you very much!!