Looks like it might be a good idea to get rid of sessioninstaller, since GNOME Software provides the PackageKit session interface properly already - but since Ubuntu doesn't use the PK backend of GS, I assume that the PK session API will also not work in Ubuntu's version of GNOME Software. Maybe try uninstalling sessioninstaller and see if GNOME Software pops up with the right package or at least an error message.
I guess this problem might only really be fixed by switching GS to use PK or alternatively make the PK session interface work in GS by other means (or, of course, by fixing sessioninstaller, but since that thing is essentially dead I assume that this would not be a viable option). ** Changed in: packagekit (Ubuntu) Status: New => Invalid ** Also affects: sessioninstaller (Ubuntu) Importance: Undecided Status: New ** Also affects: gnome-software (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to packagekit in Ubuntu. https://bugs.launchpad.net/bugs/1661371 Title: [zesty] doesn't offer a window to install missing gstreamer codecs Status in PackageKit: Won't Fix Status in gnome-software package in Ubuntu: New Status in packagekit package in Ubuntu: Invalid Status in sessioninstaller package in Ubuntu: New Bug description: Attempting to play a mp3 file with Rhythmbox on the latest Zesty daily build Rhythmbox opens but no playback start. On the terminal I got this: Rhythmbox-Message: Missing plugin: gstreamer|1.0|rhythmbox-metadata|MPEG-1 Layer 3 (MP3) decoder|decoder-audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)1, layer=(int)3 /usr/lib/python3/dist-packages/sessioninstaller/core.py:47: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded. from gi.repository import Gst /usr/lib/python3/dist-packages/sessioninstaller/core.py:48: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded. from gi.repository import Gtk Falling back to package information Rhythmbox-Message: Missing plugins installed. Updating plugin registry ... But the wizard to install the missing codec actually fails to launch. Please see https://bugzilla.gnome.org/show_bug.cgi?id=770620 To manage notifications about this bug go to: https://bugs.launchpad.net/packagekit/+bug/1661371/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp