I can confirm that clicking the refresh button in the title bar in
gnome-software's update tab triggers packagekit to write
/var/lib/PackageKit/prepared-update, which in turn makes the shutdown
dialog offer to install updates before shutting down.
A few observations:
- contrary to what's stated in comment #2, I observe that ticking the
checkbox results in updates being actually installed at shutdown
(although I don't know what happens with updates that require user
interaction)
- gnome-software's updates tab says the software is up-to-date, but
there are actually 5 package updates available, and they are listed in
/var/lib/PackageKit/prepared-update
- during my tests in a bionic VM, I also observed once that prepared-
update file being created without interaction with gnome-software: I
simply ran "sudo apt update" in a terminal window, then requested
shutdown, and the dialog offered to install updates, so something else
also triggered packagekit
** Changed in: gnome-software (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1775226
Title:
Gnome Software offers installation of updates on shutdown
independently from update-manager and unattended-upgrades
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