I am trying to get the chipsee 7" cap touch lcd to work on my beaglebone black. The board is a rev A5C.
I added the dtb entry to uEnv.txt and did the command line to update x. Not sure that second was needed because x isn't supported, but did it anyway.
The screen now turns on during boot, but nothing ever shows up.
I don't need a GUI I just need a frame buffer. I tried doing the cat /dev/urandom > /dev/fb0 and it first said no more room on the device. Then each time I did it after that it just spewed random stuff to the console.
I rebooted and now it just always says: cat: write error: No space left on device. I assume that is because fb0 isn't really connected to anything.
I am running the latest stretch 9.5 image from here:
Can someone tell me how to get frame buffer to work on this setup?