Running a wayland session with the sway-wm and a GTX1070 I cannot find any way to change the monitors refresh rate to something different than the 60Hz standart. Neither xrandr nor nvidia-xsettings does help in this case. I need 50Hz because I live in europe and we use 50Hz for television broadcast to have smooth playback.
xrandr shows me this:
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 XWAYLAND0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1920x1080 59.96*+
nvidia-xsettings gives that:
ERROR: Unable to find display on any available system
The graphics driver is installed correctly, ordinary XServer runs fine.
x86_64 Intel® Core™ i7-6700K CPU @ 4.00GHz