Instructions were in the first post i made in this thread.
But, in more detail: you need to go to the command prompt and type "sudo nano /boot/cmdline.txt" to edit the file and add "drm.edid_firmware=HDMI-A-1:Rpi480i_EDID.bin" to the end of the line. Then with the 480i EDID file on on your sd card in the /boot dir, type "sudo cp /boot/Rpi480i_EDID.bin /usr/lib/firmware/Rpi480i_EDID.bin" to copy it to the right place. Note the space between source and destination in the command. If the file is on a USB disk, open the location in the GUI, then right click on the file tree on the left and copy the path, and use that as the source dir rather than /boot.
Starting with "sudo" gives any command admin privileges, btw. The locations talked about are both protected by the OS.
If this fails to show an image on your CRT, the easiest way to recover is to stick the sd card in your windows PC and edit the cmdline.txt file back to what you want.
But, in more detail: you need to go to the command prompt and type "sudo nano /boot/cmdline.txt" to edit the file and add "drm.edid_firmware=HDMI-A-1:Rpi480i_EDID.bin" to the end of the line. Then with the 480i EDID file on on your sd card in the /boot dir, type "sudo cp /boot/Rpi480i_EDID.bin /usr/lib/firmware/Rpi480i_EDID.bin" to copy it to the right place. Note the space between source and destination in the command. If the file is on a USB disk, open the location in the GUI, then right click on the file tree on the left and copy the path, and use that as the source dir rather than /boot.
Starting with "sudo" gives any command admin privileges, btw. The locations talked about are both protected by the OS.
If this fails to show an image on your CRT, the easiest way to recover is to stick the sd card in your windows PC and edit the cmdline.txt file back to what you want.
Statistics: Posted by buttersoft — Wed Sep 18, 2024 11:15 pm