I'm using i3 window manager (shouldn't be relevant) on
XServer (ver 1.13.0),
xrandr (ver 1.3.5) and
RandR (ver 1.3). Graphics card is
Intel HD 4000.
I have set up my screen using
xrandr --output VGA1 --auto --left-of LVDS1
The issue is that my right screen (
VGA1) has horizontal lines flickering up and down (refresh frequency problem perhaps?). My monitor reports that the input is:
1440x900 H: 56KHz V:60Hz Analog Input
xrandr reports VGA1 as:
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 410mm x 256mm 1440x900 59.9*+ 75.0 1280x1024 75.0 60.0 1280x960 60.0 1366x768 60.0 1360x768 60.0 1280x800 74.9 59.8 1152x864 75.0 1280x768 74.9 59.9 1024x768 75.1 70.1 60.0 1024x576 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 848x480 60.0 640x480 72.8 75.0 66.7 60.0 720x400 70.1 1440x900_75.00 75.0
I have tried changing the options around (including adding new modes, e.g.
144x900_75.00) with no luck. How can I get rid of this annoying flickering?
UPDATE: I have just realized that the flickering of secondary screen only happens when laptop is plugged into power supply - while on battery problem does not exist. Any way to fix it?