Philip Howard

You're a step ahead of me! I'm just updating my non-64bit OctoPi image now. IIRC I had backlight working via the /sys/class interface, but the whole shebang is nothing if...

Just before I reboot with the new updates, I can confirm on Kernel 4.19.75-v7l+ with these new changes to the HP4 overlay that the following works: Backlight off: `echo 1...

@TxBillbr in my case I have `Linux octopi 5.4.51-v7l+ #1331 SMP Fri Jul 31 16:51:51 BST 2020 armv7l` and touch input is working correctly. If you're running HyperPixel4 on a...

@reneb86 it is my understanding that the problem, and solution, for both Pi 4 64bit and 32bit are the same. I've confirmed this on a Pi 4 4GB using both...

@TxBillbr ah! You've set the little rusty cogs in my brain in motion and a thought has clicked into place- Insofar as I understand, a dtoverlay may be compiled differently...

Thanks for the super thorough issue report! Looks like you've had it a while, has it ever worked or did you only just find time to try it? At face...

This is, as far as I'm aware, a hardware limitation of the Pi 4. Without some interim software layer to handle the rotation it would be down to RetroPie itself...

Did some digging and unfortunately making it 800x480 is impossible. At best I can flip X/Y to "rotate" the screen in hardware, but this just goes from one portrait orientation...

@hardillb agreed- it would be nice to have it structured as a callback, and that's relatively straight-forward to do. A non-blocking, buffer-filling, short read on the main loop that triggers...

@hardillb while you're here, and since you can build/run keybow from source... would you mind trying out the refactored code here?: https://github.com/pimoroni/keybow-firmware/pull/79 This is what any changes to the serial...