Comment 5 for bug 1722195

I set up a clean VM running up to date artful, which includes snapd-2.28.5+17.10 (so no copying of policy files or changing channel for core snap), and couldn't reproduce this. I started gnome-software, and tried to install the Hiri snap and got the expected polkit prompt.

I did get the following message though:

    Unable to install Hiri
    Failed to read from snapd: Error receiving data: Connection reset by peer

Snapd restarted during the install, presumably after it installed the core snap, so this seems like another variation of bug 1718170.

If you got a polkit prompt from the command line "snap" utility but not in gnome-software, that would indicate that it was not sending the X-Allow-Interaction header. We added that in snapd-glib 1.19, and you've got 1.23 installed.