[Bug 1650389] Re: Installing snapd on 14.04.5 desktop downgrades xorg et al.

[Steve Langasek]

I do not believe there is any path to successfully install snapd on a
14.04 desktop system.  Only one of systemd and systemd-shim can own the
systemd dbus services; systemd doesn't implement them in a way that will
work with upstart as pid1, which means we need systemd-shim to own them
so that the desktop consumers of the services will function; and it's
intrusive surgery to make systemd work without registering them.

This was a known limitation when the SRU went through, and it was
allowed because the understood target for snapd on 14.04 was
server/cloud environments, not desktops.  Has that changed?

** Changed in: systemd (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1650389

Title:
  Installing snapd on 14.04.5 desktop downgrades xorg et al.

Status in Snappy:
  Confirmed
Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  When trying to install the latest snapd on a 14.04.5 desktop image,
  the installation of systemd (as a dependency of snapd) triggers a
  whole bunch of downgrades as systemd-shim is removed and replaced with
  systemd.

  We have to adjust the packaging such that installation of systemd does
  not trigger such behavior for packages depending on systemd-shim in
  trusty.

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