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Raspberry Pi OS • Re: Force HDMI on with RasperryPiOS 5.3 (July 2024) + Login screen on both monitors

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The issue is your display is not providing the edid when queried and in standby (usually they do - which is much more convenient).
You can capture this edid to a file, and use that.

Code:

# find /sys -name edid/sys/devices/platform/axi/axi:gpu/drm/card1/card1-HDMI-A-1/edid/sys/devices/platform/axi/axi:gpu/drm/card1/card1-HDMI-A-2/edid
copy the two edid files to /lib/firmware/edid1 and /lib/firmware/edid2.

Now add to cmdline.txt:

Code:

drm.edid_firmware=HDMI-A-1:edid1 drm.edid_firmware=HDMI-A-2:edid2
and reboot.

Statistics: Posted by dom — Mon Jul 29, 2024 5:33 pm



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