you said" My question was does anyone have any idea how this may have happened?"
yes.
The latest "bullseye" and "Bookworm" releases use the KMS video driver.
The KMS driver seems less forgiving when the EDID data from the monitor is bad, nonexistant, or malformed.
If you get no display:
probably, your PI OS cannot figure out the EDID data from the monitor, and as such, cannot figure out what resolution to set.
there have been many reports of "failed video output" which boil down to bad or non-existant EDID data from the monitor. This is an issue more often with the new KMS driver in Bullseye and Bookworm.
note: many HDMI adapters do not pass data in both directions, and can be the cause of no EDID Data. It is recommended to get the proper cable, and not use adapters.
- check your HDMI cabling and EDID status:
power off your PI
remove the SD card
power on the pi.
- you should get the diagnostic display as shown below. Pay attention to the EDID data status (the last line... below says EDID OK
if not, may be your cabling or (an adapter?)
however, you can set the resolution manually:
in /boot/cmdline.txt (add to the front/end of the line, NOT a new line)
-- IMPORTANT NOTE: for Bookworm, the file is at /boot/firmware/cmdline.txt !!
video=HDMI-A-1:1024x768@60D
(or whatever resolution you want)
OR - as you did in the .ini file.
yes.
The latest "bullseye" and "Bookworm" releases use the KMS video driver.
The KMS driver seems less forgiving when the EDID data from the monitor is bad, nonexistant, or malformed.
If you get no display:
probably, your PI OS cannot figure out the EDID data from the monitor, and as such, cannot figure out what resolution to set.
there have been many reports of "failed video output" which boil down to bad or non-existant EDID data from the monitor. This is an issue more often with the new KMS driver in Bullseye and Bookworm.
note: many HDMI adapters do not pass data in both directions, and can be the cause of no EDID Data. It is recommended to get the proper cable, and not use adapters.
- check your HDMI cabling and EDID status:
power off your PI
remove the SD card
power on the pi.
- you should get the diagnostic display as shown below. Pay attention to the EDID data status (the last line... below says EDID OK
- Image may be NSFW.
Clik here to view.
however, you can set the resolution manually:
in /boot/cmdline.txt (add to the front/end of the line, NOT a new line)
-- IMPORTANT NOTE: for Bookworm, the file is at /boot/firmware/cmdline.txt !!
video=HDMI-A-1:1024x768@60D
(or whatever resolution you want)
OR - as you did in the .ini file.
Statistics: Posted by terribleted — Fri Feb 02, 2024 2:29 pm
