*** 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
Status in linux package in Ubuntu:
Confirmed
Bug description:
I have installed Ubuntu 20.04 (using the image created on 20 april) on
my Dell XPS15 9560. This laptop has a Intel / nVidia combo.
The problem i am facing is that when i have an external monitor
connected to the laptop through the HDMI connector of the laptop,
Ubuntu does not boot and hangs on the splash screen. I have not found
any way to get logging on any kind.
Before i was running Ubuntu 18.04 and did not have any problems with
the monitor and HDMI cable. After boot is finished (without monitor
connected) inserting the HDMI cable works fine and i can use the
monitor and laptop screen without any problem.
I have installed the preferred nVida proprietary driver. Also it does
not matter if booting with nVidia selected or Intel selected.
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