Which Khadas SBC do you use?
VIM3
Which system do you use? Android, Ubuntu, OOWOW or others?
ubuntu 20.04
Which version of system do you use? Khadas official images, self built images, or others?
khadas official images
Please describe your issue below:
version 4.9 can not touch screen
version 5.18 can not find the serial port (e.g. ttyS2)
Post a console log of your issue below:
**Delete this line and post your log here.**