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I upgraded my Beagle Bone Black BBB from V18 to V20.4.3 My Hdmi Port no longer working

in flag

I upgraded my fully functioning BBB from Ubuntu V18 to V20.4.3 I used the Updater on the desk top. After the very long upgrading process It asked to reset the BBB.
After resetting the HDMI Port no longer works. (I can see the penguin and then a cursor than the screen goes blank)

I can putty into the BBB and I can see the previous mod In etc/X11 xorg.conf (Needed to set up the default Monitor for a previous version ) was still there and intact.

What am I missing?

ar flag
I have no experience with Beagle Bone Black or any other Beagle Bones. From what I could find by Googling, it seems like the Ubuntu version needed for install on these boards are specially configured by a third party. That is no official version is available. If this is true it would be very difficult to figure out what was tweaked in the original version and that got messed up by the upgrade. Your best bet may be to install again.
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