Fix Ubuntu Low-Resolution Issue

Hi guys,
Most of the ubuntu-users already know how to fix this issue, but sometimes it could be not. So that’s why I write this article.
let’s begin,
first of all, you should open the terminal and type this command.

cvt 1920 1080 60

In this command, you have to change the monitor details “1920 1080 60”, is according to my monitor, that’s 1080p screen, and refresh rate is 60Hgz, so adjust as you want. It will give you details like below,

# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

Take the Modeline detail and run the below command

sudo xrandr --newmode  "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

Then check the port your connected external monitor/build-in monitor, use this command,

xrandr / xrandr -q

the above command will give you result like this,

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384

eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 174mm

   1920x1080     60.02*+  60.01    59.97    59.96    59.93    47.99

   1680x1050     59.95    59.88
 
   1600x1024     60.17

   1400x1050     59.98

   1600x900      59.99    59.94    59.95    59.82

HDMI-1 disconnected (normal left inverted right x axis y axis)

DP-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm

   1024x768      60.00

   800x600       60.32    56.25

   848x480       60.00

   640x480       59.94

HDMI-2 disconnected (normal left inverted right x axis y axis)

Identify the connected build-in screen / external screen, HDMI-1/HDMI-2/DP-1/etc… In my case, its DP-1.
Then execute the below command. (change resolution and refresh rate according to your requirement)

xrandr --addmode DP-1 1920x1080_60.00

Now the screens go-to black, and your monitor issue will be fixed. If it’s not happened, go to settings and check whether the screen has newly added resolution, and manually change the screen resolution.

This fixing is not permanent. If you want it permanently, add given ‘xrandr’ commands to the ‘profile’ file.
Do not add ‘sudo’ because it will crash your startup screen. You can open ‘profile’ file using below command (you can use any text editor, in here i’m using nano )

sudo nano ~/.profile

Dont forget to save the file

Tada! Thats all. I hope this article will help you to fix the issue.
Thank you, guys.
We will see you soon.