[robca]

I'm using a CN60 with Coreboot and Libreelec 9.2.6. Everything is working fine, as long as I turn on the TV (Vizio M55-F0), then turn on the Asus CN60.

If I reboot the Chromebox when the TV is off, I get no screen upon turning on the TV. I suspect that the CN60 defaults to DP and not HDMI when rebooting without a display.

Is there a way to force the system to use HDMI when rebooting (maybe using a startup script?). I tried playing with xrandr, but when the display is off, I get "disconnected" for all device, and when I try to use the xrandr --output HDMI1 --mode 0x126, I get an error (when the display is connected, I can set the 0x126 mode, which in my case is 1920x1080p60). Output from xrandr --verbose with the display off is here https://paste.kodi.tv/omorebayik

Is there a way to boot in HDMI, FHD mode? Even when I turn on the TV then the CN60, most of the times the default screen gets reverted to 4K, which doesn't really work well on such an old Chromebox

EDIT: I searched more past posts with similar problems, and I found something that might possibly apply. Is this a case where I should use a custom EDID as per https://wiki.libreelec.tv/configuration/edid? In other cases I saw mentions of a custom BIOS with hardcoded 1080p resolution, which would also work for me