You have been subscribed to a public bug:
I faced this issue on Ubuntu 20.04. My system is fully updated, no
update is pending.
Steps to reproduce
1) Attach an external display with a laptop
2) Set external display as primary
3) Select only single display option
4) Restart your laptop while external display is attached
When the first ubuntu screen is displayed after restart, before login
screen. The system stops there, ubuntu logo with round circle animation
works, but system does not proceed to login screen. I have waited for
about 15 minutes but it did not proceed to login screen, instead it
showed round circle animation with ubuntu logo. Then I forcefully turned
off my laptop by holding down power button. The I detached my external
display and it worked fine. I have faced this issue many times.
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bot-comment
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Stuck on welcome screen when attached an external display with laptop
https://bugs.launchpad.net/bugs/1888416
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Bugs, which is subscribed to gdm3 in Ubuntu.
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