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I have setup Ubutnu Desktop v21.10 on my Rapberry Pi 4.
On my 24" monitor using an HDMI cable, it works fine.
I'd like to set it up on my 65" Samsung TV, but the TV is not recognizing it. When I boot the Pi, the rainbow screen appears on the TV, but then it goes black, and the TV says it cannot find the source.

I've tried adding these settings to /boot/firmware/config.txt in various combinations, but none of them have helped:
disable_overscan=1
hdmi_drive=2
hdmi_force_hotplug=1
hdmi_enable_4kp60=1

I was previously running the Raspberry PI OS with this same hardware and TV, and it worked, so I don't think it's a hardware issue.

Any ideas for anything else I can try?
11-23-2021, 11:23 PM
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