LE11@RPI4 force HDMI output without EDID

    Hi,

    Since LE11 does not work well on the RP3 I just upgraded to RPI4.

    During this process I finally solved my monitor problem where LE9 always needed to wait for the monitor to boot before switching on. I simply added the line

    Code
    hdmi_force_hotplug=1

    to config.txt. Issue solved.


    Now the RPI4 does not bring any picture after the boot up rainbow. I tried the above hack, but it did not help.

    I checked edid info and it looks like the tv is invisible to LE11.

    Code
    # dump-active-edids
error: no active connectors found
# kmsprint 
Connector 0 (32) HDMI-A-1 (disconnected)
  Encoder 0 (31) TMDS
Connector 1 (42) HDMI-A-2 (disconnected)
  Encoder 1 (41) TMDS

    So, is there any way to force Full HD to one the outputs?

    thank you very much.

    • Best Answer

    Since LE 10, HDMI options have been moved from config.txt to cmdline.txt.

    1. Login by SSH, and open the file cmdline.txt. It works similar to config.txt.
    2. Append vc4.force_hotplug=1 to the end of the line.
    3. Store that file, and reboot.