X blank screen

[Arwen]

Perfect. I've added a trouble shooting section for this problem & solution;

Wiki - Pinebook Pro - After changing builtin LCD resolution, blank screen

As usual, feel free to correct, improve or comment, (good or politely bad).

I tried your solution but message pops up can't open display :0

I don't know what to do then? please help

Sorry, I just copied the other person's solution, (which worked for them), to the Wiki. I've never experienced this problem.

You can try something like this, but I don't make any guarentees;

• Using a text console, (Control-Alt-F1), login with your normal user ID
  
• Edit the file "nano ~/.config/monitors.xml"
  
• Change the "width" value to "1920"
  
• Change the "height" value to "1080"
  
• If there is more than one monitor configuration listed, edit that one too.
  
• Be careful to make no other changes. If needed exit without saving and re-edit.
  
• Save the file and exit.
  
• If you are still loggied in via the GUI, you will have to reboot using "sudo shutdown -r now".
  
• After the reboot, you should be able to login to the GUI login and have the resolution back to normal.
  

Let us know if that worked, so I can update the Wiki.