I have 3 monitors, one of which is a CRT, and I need to bump up it's refresh rate to 75/80 to get rid of the flicker, I've used it with my Raspberry Pi and it fully supports up to 100Hz. When I use
xrandr it tries to change my 1st monitor, I want my 2nd one changed.
xrandr confirms that I can do this,
HDMI1 connected 1280x1024+2646+0 (normal left inverted right x axis y axis) 338mm x 270mm 1280x1024 60.02*+ 75.02 1920x1080 60.00 59.94 1152x864 75.00 1280x720 60.00 59.94 1024x768 75.08 60.00 800x600 75.00 60.32 720x480 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08
I have Intel HD Graphics 4400. Ubuntu 16.04.