I'm currently evaluating a Linux based ARM board for a small office automation project, and so far the overall performance has been quite stable. One of the peripherals I'm testing is a biometric attendance device, and I'm interested in making sure it can run reliably for long periods without commun...

Thanks for sharing this. The fact that 4K@120Hz works correctly on Ubuntu but shows display issues on Android strongly suggests that the hardware is capable and the problem is likely related to the Android firmware or HDMI driver implementation. Since you experienced the same behavior on both the M6...