*** This bug is a duplicate of bug 1872159 ***
https://bugs.launchpad.net/bugs/1872159
Same error here using a Lenovo Yoga X1 3rd with fully updated Ubuntu
20.04 (focal).
Removing "quiet splash" seems to work and also observed (when I was
trying to debug this) that pressing Esc key to avoid splash screen and
see the boot logs workarounds this annoying bug too.
Seems some kind of problem with plymouth (if it's still the tool which
handles the splash screen) or something related, but I don't have time
to debug the boot process in more depth.
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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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