Perhaps, you have searched how to setting custom screen resolution or just resolution on Linux before.
After a few process, you have set up screen resolution and saw it's not affected on next reboot.
Alright, how to setting up custom screen resolution on Linux? Permanently 🦾
Step.1
Learn name of your destination screen
In terminal,
xrandr
You can see output like bellow.
$ xrandr
Screen 0: minimum 320 x 200, current 2880 x 900, maximum 16384 x 16384
eDP-1 connected primary 1280x720+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1366x768 59.99 + 39.94
1280x720 60.00* 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 connected 1280+720+0 (normal left inverted right x axis y axis) 160mm x 90mm
1920x1080 60.00 + 50.00 59.94
1280x1024 60.02
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32
720x480 60.00 59.94
640x480 60.00 59.94
720x400 70.08
My screen names are eDP-1 and HDMI-1.
In this example, i am gonna add custom screen resolution to HDMI-1 screen and set as permanently.
Step.2
Generate resolution parameter.
In terminal,
cvt 1600 900 60
With cvt command, we can create resolution modeline data.
Let me show you output.
$ cvt 1600 900 60
# 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
To using on xrandr command, we have to copy output after Modeline word.
Like this,
"1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
Step.3
Now we can create new resolution mode.
In terminal,
$ xrandr --newmode <copied commands>
For example,
$ xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
Step.4
Add resolution mode.
$ xrandr --addmode HDMI-1 "<width>x<height>_<Hz>"
Like this,
$ xrandr --addmode HDMI-1 "1600x900_60.00"
Almost done!
Step.5
Set custom resolution.
$ xrandr --output HDMI-1 --mode "1600x900_60.00"
Make permanent!
Add all xrandr mode commands to Xsetup file.
$ sudo nano /usr/share/sddm/scripts/Xsetup
Add bellow,
xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
xrandr --addmode HDMI-1 "1600x900_60.00"
We are not add screen resolution command because system has stored resolution data of specific screen already.
Save file and see yourself!
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