I install latest Arch Linux on Rock64 and Ethernet, USB, and console HDMI output works.
How do I make graphical output work on HDMI? After installing xorg and starting it, I see in the logs that it complains about fbdev
$this->bbcode_second_pass_code('', ' (EE) Failed to load module "fbdev" (module does not exist, 0)')
However installing xf86-video-fbdev does not help. xorg does not log errors but the screen goes blank, still.
Any idea what to try?