Comment # 2 on bug 1179942 from Andrei Borzenkov

Created attachment 844497 [details]
gnome-software log with GS_DEBUG=1

Yes, since a couple of weeks g-s does not work anymore. It apparently never
downloads and prepares anything and immediately jumps to Restart & Update which
fails.

I disabled g-s autostart, attached is log of GS_DEBUG=1 gnome-software. It
starts, refreshes repositories, tells me there are updates, when I switch to
Updates tab I am offered Restart & Update (which cannot be true as nothing was
downloaded yet); pressing it results in mentioned error.

It seems g-s decides whether to activate Download or Restart&Update buttons
based on size of updates to download. Unfortunately debug output does not cover
this part of code at all.

Below are also current g-s settings

bor@tw:~> gsettings list-recursively org.gnome.software | sort
org.gnome.software allow-updates true
org.gnome.software.auth account-id ''
org.gnome.software check-timestamp int64 1608096823
org.gnome.software compatible-projects ['GNOME', 'KDE', 'XFCE']
org.gnome.software download-updates-notify true
org.gnome.software download-updates true
org.gnome.software enable-repos-dialog true
org.gnome.software enable-shell-extensions-repo true
org.gnome.software external-appstream-system-wide false
org.gnome.software external-appstream-urls @as []
org.gnome.software filter-default-branch true
org.gnome.software first-run false
org.gnome.software free-repos @as []
org.gnome.software free-repos-url ''
org.gnome.software install-bundles-system-wide true
org.gnome.software installed-page-show-size true
org.gnome.software install-timestamp int64 1606666397
org.gnome.software nonfree-software-uri
'https://en.wikipedia.org/wiki/Proprietary_software'
org.gnome.software official-repos @as []
org.gnome.software online-updates-timestamp int64 1608096844
org.gnome.software popular-overrides @as []
org.gnome.software prompt-for-nonfree true
org.gnome.software refresh-when-metered false
org.gnome.software review-karma-required 0
org.gnome.software review-server 'https://odrs.gnome.org/1.0/reviews/api'
org.gnome.software screenshot-cache-age-maximum uint32 2592000
org.gnome.software security-timestamp int64 0
org.gnome.software show-nonfree-prompt true
org.gnome.software show-nonfree-ui true
org.gnome.software show-ratings false
org.gnome.software show-upgrade-prerelease false
org.gnome.software upgrade-notification-timestamp int64 0
bor@tw:~> ll /var/lib/PackageKit
total 44
-rw-r--r-- 1 root root 40449 Nov 29 19:13 offline-update-competed
lrwxrwxrwx 1 root root    45 Aug 22  2018 transactions.db ->
../../../usr/share/PackageKit/transactions.db
bor@tw:~>