Setting new mode for 2nd monitor fails

Andrej van der Zee andrejvanderzee at gmail.com
Fri Jun 9 16:39:04 UTC 2017


Hi,

My external monitors resolution is too low, but xrandr does not show any
higher resolution. I am trying to create a new mode, but it falis to start
like below. How can I set the resolution of my external monitor to
4096x2160?

Thanks,
Andrej

$ xrandr
Screen 0: minimum 8 x 8, current 5440 x 1800, maximum 32767 x 32767
eDP1 connected primary 2880x1800+0+0 (normal left inverted right x axis y
axis) 331mm x 207mm
   2880x1800     59.99*+
   2560x1600     60.00
   2048x1536     60.00
   1920x1440     60.00
   1856x1392     60.01
   1792x1344     60.01
   1920x1200     60.00    59.95
   1920x1080     59.93
   1600x1200     60.00
   1680x1050     60.00    59.95    59.88
   1600x1024     60.17
   1400x1050     59.98
   1280x1024     60.02
   1440x900      59.89    60.00
   1400x900      60.00
   1280x960      60.00
   1360x768      59.80    59.96
   1280x800      60.00
   1152x864      60.00
   1024x768      60.00
   800x600       60.32    56.25
   640x480       59.94
DP1 connected 2560x1440+2880+0 (normal left inverted right x axis y axis)
597mm x 336mm
   2560x1440     59.95*+
   1280x720      59.86
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

$ xrandr --newmode "4096x2160_60.00"  759.54  4096 4424 4880 5664  2160
2161 2164 2235  -HSync +Vsync
$ xrandr --addmode DP1 4096x2160_60.00
$ xrandr --verbose --output DP1 --mode  4096x2160_60.00
screen 0: 5440x2160 1438x571 mm  96.05dpi
crtc 2: 4096x2160_60.00  60.00 +0+0 "DP2"
xrandr: Configure crtc 2 failed
crtc 0: disable
crtc 1: disable
crtc 2: disable
crtc 3: disable
screen 0: revert
crtc 0: revert
crtc 1: revert
crtc 2: revert
crtc 3: revert
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