Changing refresh rate on new monitor isn't working

Hi, I replaced my previous 60Hz monitor with a new 144Hz one today, but I can’t set a refresh rate higher than 60Hz either through Manjaro Settings Manager, Nvidia X Server Settings or xrandr.

In the first, when I pick 144Hz from the dropdown menu and click OK and close the settings window, the refresh rate gets reset to 60Hz (I think it never gets set to 144Hz in the first place); in the second, the refresh rate selection drop-down is greyed out and unexpandable; in the third, once I list available resolutions and refresh rates:

Screen 0: minimum 8 x 8, current 3440 x 1440, maximum 32767 x 32767
DVI-D-0 disconnected primary (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected 3440x1440+0+0 (normal left inverted right x axis y axis) 800mm x 330mm
   3440x1440     59.97*+ 144.00   120.00    99.98
   2560x1080    143.94   119.88    59.98    59.94    50.00
   1920x1080     60.00    59.94    50.00
   1720x1440     59.94
   1680x1050     59.95
   1440x900      59.89
   1280x1024     75.02    60.02
   1280x720      60.00    59.94    50.00
   1024x768      99.97    75.03    70.07    60.00
   800x600       99.66    75.00    72.19    60.32    56.25
   720x576       50.00
   720x480       59.94
   640x480       99.77    75.00    72.81    59.94    59.93
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)

And then run

xrandr -s 3440x1440 -r 144.00

It returns:

Rate 144.00 Hz not available for this size

I searched these forums and wider web for solutions, but the relevant threads either have no replies or no solutions. I am out of ideas myself, as I’ve never had to deal with refresh rate adjustment on Linux.

I am running 6.1.1-1 kernel through bspwm and X11
The monitor is AOC CU34G2X/BK
The GPU is GeForce GTX 1070

Any ideas? Is this maybe because of bswpm/picom? Do I need to set something in those configs?

Just managed to fix this after yet another attempt. Looks like the xrandr command needs full arguments, in my case:

xrandr --output DP-0 --mode 3440x1440 --rate 144.00

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