Before reporting upstream, please try this to find out why it's not
sleeping:
systemd-inhibit --list | less
Apparently that will list the reasons for not sleeping, which can
sometimes include having displays attached. Only if we can't make sense
of the output would I then report the issue upstream.
** Changed in: gnome-settings-daemon (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2075983
Title:
Laptop does not sleep when lid is closed if external monitor connected
Status in gnome-settings-daemon package in Ubuntu:
Incomplete
Bug description:
Release: Ubuntu 24.04 LTS
gnome-shell:
Installed: 46.0-0ubuntu6~24.04.1
Expected behavior (As seen on Windows/macOS):
* When plugging in external displays, they should be able to scale
independently of the internal display
* When external displays are active through a display link dock, closing
the laptop lid should invoke suspend
The above behavior would match the behavior seen when displays are
connected directly to the laptop.
Actual behavior:
* External displays connected through a DisplayLink dock are forced to the
same scaling ratio
* Closing the laptop lid when external displays are connected through a
display link dock results in the internal display turning off but no sleep
behavior
* This happens regardless of config changes with dconf, upower, or logind
This is primarily a usability issue for laptops with limited ports for
IO and extremely high resolution internal panels.
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