Discard my remark about correct xrandr values, I apparently put my glasses upside down. Xrandr gives:
1920x1080 50.0 51.0 52.0* 156.0
at startup it's at 50Hz but switching with nvidia settings every time switches between 52 and 156Hz. Using set auto in between I can set 60Hz while xrandr gives 52Hz, set 60Hz while xrandr gives 156Hz, set 50Hz get 52Hz or set 50Hz get 156Hz.
Discard my remark about correct xrandr values, I apparently put my glasses upside down. Xrandr gives:
1920x1080 50.0 51.0 52.0* 156.0
at startup it's at 50Hz but switching with nvidia settings every time switches between 52 and 156Hz. Using set auto in between I can set 60Hz while xrandr gives 52Hz, set 60Hz while xrandr gives 156Hz, set 50Hz get 52Hz or set 50Hz get 156Hz.