*** This bug is a duplicate of bug 1872159 ***
https://bugs.launchpad.net/bugs/1872159
Hi,
I had also same problem (after update to Ubuntu 20.04, had only blank screen on
my monitor), but recently found a 'solution' accidentally! MAYBE, it is the
same problem like mine!
My monitor is being connected via 'D-Sub' and 'HDMI' cables. It seems, separate
monitor instance is created in display settings ("Single Display") for each
connection type and you won't see anything in the monitor if you had selected a
wrong monitor instance (non-HDMI). In my case, I had selected 'D-Sub' monitor
instance and 'HDMI' output didn't work or I had blank screen for HDMI input.
Seems now I have selected the correct monitor instance for HDMI. So, maybe you
also had the same issue that you had selected a 'non-HDMI' monitor instance!
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https://bugs.launchpad.net/bugs/1874194
Title:
Ubuntu 20.04 HDMI connected, no boot
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