Notes

Add Monitor Profile

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Armbian
2 minutes

On Armbian, i’m getting no monitors listed, just one entry saying default. Nothing in terms of display or video with lshw. Nothing in Applications > Settings > Display.

For refernce, i have an Asus VX24AH 2K-WQHD 23.8"" monitor. Drivers for this monitor are only available for Windows

1sudo lshw -C display
2sudo lshw -C video

You can add a monitor with the xrandr command. RandR (Rotate and Resize)

1$ xrandr --help | grep monitor

  --listmonitors
  --listactivemonitors
  --setmonitor <name> {auto|<w>/<mmw>x<h>/<mmh>+<x>+<y>} {none|<output>,<output>,...}
  --delmonitor <name>

xrandr --listmonitors 
Monitors: 4
 0: +*DVI-I-2 5040/473x1050/296+0+0  DVI-I-2
 1: DVI-I-2~1 1680/490x1050/270+0+0 
 2: DVI-I-2~2 1680/490x1050/270+1680+0 
 3: DVI-I-2~3 1680/490x1050/270+3360+0

On an Orange Pi Plus 2 with Armbian connected to Asus VX24AH

xrandr --listmonitors
xrandr: Failed to get size of gamma for output default
Monitors: 1
 0: +default 1920/508x1080/286+0+0  default

The format for adding a monitor is as follows

xrandr --setmonitor "monitor_name" "width_px"/"width_mm"x"height_px"/"height_mm"+"x_offset_px"+"y_offset_px" "output_name"

1xrandr --setmonitor "Asus" 2560/526x1440/296+0+0 "default"
  • Asus 24" VX32AH monitor has screen dimensions of 526mm x 296mm
  • Sony Bravia 32" TV has a screen size of 27.8" width x 15.5" (706mm x 394mm). The resolution is HD-Ready 1280x720 (720p)
1xrandr --setmonitor "Sony Bravia" 1280/706x720/394+0+0 "default"

1output list Sony Bravia
2add monitor Sony Bravia
3output name Sony Bravia
4xrandr: Failed to get size of gamma for output default

NOTES

  • The X conf file is at /etc/X11/xorg.conf
  • conf files naming convention
  • fbturbo is an Xorg driver for Allwinner and other ARM-based devices
  • Check for errors in cat /var/log/Xorg.0.log

ERROR

xrandr: Failed to get size of gamma for output default

Gamma is specified in the xrandr --output command. For example:

1xrandr --output default --mode 1280x720_60 --gamma 1.000:1.000:1.000

xrandr: Configure crtc 0 failed

Setting up the monitor in /etc/X11/xorg.conf.d

1sudo touch 05-asus_vx24ah.conf
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