ODROID C2 update to v9 -> 4k problems scullbox February 10, 2019 at 4:23 PM yep, something similar happens here too.I can switch to 2160p 60Hz, but then the TV screen flickers, 'HDMI blink' or however that is called. Switching to 1080p 60Hz fixes the problem, but defeats whole purpose of C2 in my case.