Hi,
I've been reading all these posts with all these problems but I have encountered none of them with my GT1 except for Kodi stopping sometimes if it's running in the background. No green screen flicker, no dark playback, etc. Is it possible that there are different batches out there? I have bought mine on aliexpress not gearbest like most people.
If you look in the firmware section this is what Beelink tells us .
please check your Serial Number(S/N), only your device with S/N A912 please choose 6255 Firmware, the others (with S912 or G912) please choose 9377 Firmware.