I am using opencv to do color identification. It can be successfully run when I connect the Pi to a display.

But when I use a VNC to connect to the Pi and run that program it hinted:

Xlib: extension “RANDR” missing on display “:1.0”  
(video1812): GdkGLExt -WARNING **:window system doesn't support OpenGL

Then the program stopped. I think maybe I am missing some OpenGL lib, but I don't know which one and how to install it. How can I fix this problem?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.