I try to change the external monitor refresh rate for my IIYAMA PROLITE X4071UHSU-B1 Monitor on a XNG p406 Laptop. I'm using the internal Intel GPU.
xrandr
gives me:
eDP1 connected primary 1920x1080+0+961 (normal left inverted right x axis y axis) 309mm x 174mm
1920x1080 60.02*+ 59.93
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 60.00
(...)
DP1 connected 3840x2160+1920+0 (normal left inverted right x axis y axis) 878mm x 485mm
3840x2160 60.00 + 30.00* 29.97
1920x2160 60.00
2560x1440 59.95
2048x1152 60.00
(...)
So, 60Hz should be available, but is not used.
So I try to switch to 60 hz with xrandr --output DP1 --rate 60
. But nothing happens. No output in the console, no flickering or something. And xrandr gives the same output like above.
Am I doing something wrong?
My Ubuntu: 16.04 With 4.7.2-040702-generic kernel
cat ~/.config/monitors.xml
and see the specific monitor. What is the rate for that monitor in that file? For example <rate>60</rate>