No HDMI output with 12.0.2 on RPi 4B

    Hello everyone!

    I tried installing 12.0.2 onto a RPi 4 I had laying around. It boots...but I can't get a display via either a monitor or my TV. I pulled out the microSD card and powered on the Pi and the RPi BIOS screen shows up, but when it actually goes to boot the system it blanks out and the TV can't get signal. I enabled SSH on boot and SSH'd in and it appears that everything is running....just no output. I tried getedid create but that didn't work.

    The device does show up in my RokuTV's CEC device menu, if that helps any.

    Here is the upload from pastekodi https://paste.libreelec.tv/novel-kangaroo.log

    It's trying to run the GUI at 4K60 and perhaps the TV doesn't support 4:2:0 input or the cables don't support the bandwidth needed or something. Either way the GUI is best at 1080p, see: https://wiki.libreelec.tv/configuration/4k-hdr

    Edit cmdline.txt to remove the unnecessary EDID stuff, then append video=HDMI-A-1:1920x1080M@60 to force the initial DRM output to 1080p@60Hz. Fixed?

    In config.txt:

    * Remove initramfs edid.cpio

    * #comment out hdmi_enable_4kp60=1 as this requires more power

    If you are using any kind of micro-HDMI adapter, bin it and get a proper micro-HDMI to standard HDMI cable. Or if you are using an Argon case, remove the board from the case and connect it direct to the TV (it uses an adapter, and adapters cause problems). Also try other HDMI ports on the TV (not all are equal).