[Bug 2039268] Re: When upgrading to Mantic, it fails to install snap firmware-updater

[Steve Langasek]

mount showed /dev/vda2 mounted on /snap.  'sudo umount /snap' revealed
the contents of /snap/snapd/18933.

Also for reference, the desktop system I upgraded where I could not
reproduce this is ancient, continuously upgraded, and apparently does
not have the snapd snap installed at all?

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https://bugs.launchpad.net/bugs/2039268

Title:
  When upgrading to Mantic, it fails to install snap firmware-updater

Status in snapd package in Ubuntu:
  New
Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  While upgrading to Mantic the following message is reported:

  installing snap firmware-updater
  error: cannot perform the following tasks:
  - Automatically connect eligible plugs and slots of snap "firmware-updater" (internal error: auto-connect of &{"firmware-updater:desktop-legacy" "snapd:desktop-legacy"} failed: snap "snapd" has no slot named "desktop-legacy")

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