Can't enable 175Hz refresh rate

General system Kernel, boot, graphics & hardware
1

Hello. I am running the latest version of EndeavourOS, with Nvidia GPU and nvidia-dkms driver which I spent half a day installing. However, when I go to display settings and select 175Hz, the output of my monitor gets cropped? There are black bars on both ends of the monitor for some reason, but the resolution stays same according to the display settings. 120Hz works perfectly. I’m running Gnome and my monitor is driven by RTX 3080 Ti over an HDMI 2.1 cable.

Here’s an output of xrandr -q:

Summary 
Screen 0: minimum 8 x 8, current 3440 x 1440, maximum 32767 x 32767
HDMI-0 connected primary 3440x1440+0+0 (normal left inverted right x axis y axis) 1mm x 1mm
   3440x1440     59.96 + 174.96   119.96* 
   2560x1440    174.97   120.00    59.95  
   1920x1080    174.92   120.00   119.88    60.00    59.94  
   1680x1050     59.95  
   1600x900      60.00  
   1440x900      59.89  
   1280x1024     60.02  
   1280x800      59.81  
   1280x720      60.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x480       59.94  
   640x480       59.94  
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)
HDMI-1-2 disconnected (normal left inverted right x axis y axis)
HDMI-1-3 disconnected (normal left inverted right x axis y axis)
DP-1-4 disconnected (normal left inverted right x axis y axis)
HDMI-1-4 disconnected (normal left inverted right x axis y axis)
2

Use DP whenever you can. HDMi is poopoo…

3

Well, I guess I’m fine with 120Hz, thanks for your input.

4

I had similar Experiences with HDMi, changing to DisplayPort solved it - so just try it, I’d suggest.

5

I have better experience gaming with HDMI 2.1 on Windows because of more bandwidth and dynamic HDR mapping support. If this issue is unfixable on Linux, I’d rather have 120Hz on Linux and dynamic HDR on Windows rather than 175Hz on Linux and static HDR on Windows.