List the resolutions and frequencies supported by the current environment
neardi@LPA3588:~$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1920x1080 60.00*+ 60.00 50.00 30.00 24.00
4096x2160 24.00
3840x2160 30.00 25.00 24.00
1920x1080i 60.00 50.00
1280x720 60.00 60.00 50.00 50.00 30.00 24.00
720x576 50.00 50.00
720x576i 50.00 50.00
720x480 59.94 59.94 59.94
720x480i 59.94 59.94
HDMI-2 disconnected (normal left inverted right x axis y axis)
DSI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1920x1080 60.00*+
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
1920x1080 is your current resolution. You can see from the output of xrandr that HDMI-1 is your primary display and its current mode is 1920x1080 and its refresh rate is 60.00.
Change resolution
Only one display is connected, no need to switch resolution with parameters
$ xrandr -s 1280x720
You can use the --output option to specify the output to operate, the --mode option to specify the mode to set, the --rate option to specify the refresh rate to set, the --auto option to enable output and set the optimal mode, and the --off option to turn off output. For example:
$ xrandr --output HDMI-1 --mode 1280x720 --rate 60
$ xrandr --output DSI-1 --off
$ xrandr --output DP-1 --auto
Switch dual screen resolution
- Same display: Set the mode of DSI-1 output (usually the built-in display) to the same as that of HDMI-1 output (usually the external monitor), and overlap the positions of the two outputs to form a mirror display.
$ xrandr --output DSI-1 --same-as HDMI-1 --auto
- Different display: Set the VGA output (usually an external monitor) to the best mode and place it to the right of the LVDS output (usually a built-in display) to form an extended display.
$ xrandr --output VGA --right-of LVDS --auto
- Turn off VGA output and only keep the display of other outputs.
$ xrandr --output VGA --off
- Set the VGA output mode to the best mode and turn off the LVDS output, leaving only the VGA output display.
$ xrandr --output VGA --auto --output LVDS --off
- Turn off the VGA output and set the LVDS output mode to the best mode, leaving only the LVDS output display.
$ xrandr --output VGA --auto --output LVDS --off
Set contrast
- Checking HDMI-1 supported properties
$ xrandr --verbose
Check if there are any contrast-related settings. If it is not in the list, your driver does not support this feature.
Normal return example:
HDMI-1 connected primary 1920x1080+0+0 (0x4a) normal (normal left inverted right x axis y axis) 0mm x 0mm
contrast: 50
range: (0, 100)
HDMI-1 supports a contrast property with a range of (0, 100). The current setting shows a contrast of 50.
- Set HDMI-1 Contrast 80
$ xrandr --output HDMI-1 --set contrast 80
Set home screen
- Set LVDS as main screen
$ xrandr --output LVDS --primary
Rotate screen
- Rotate 90 degrees clockwise
$ xrandr --output <display_name> --rotate right
- Rotate 90 degrees counterclockwise
$ xrandr --output <display_name> --rotate left
- Rotate 180 degrees
$ xrandr --output <display_name> --rotate inverted
- Return to normal (no rotation)
$ xrandr --output <display_name> --rotate normal
Set to take effect at startup
Add the corresponding xrandr command to ~/.profile and reboot.