[Bug 1625023] Re: switch to systemd on ubuntu phone xenial

[Vicamo Yang]

** Also affects: lxc-android-config (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  switch to systemd on ubuntu phone xenial

Status in Canonical System Image:
  Confirmed
Status in android-tools package in Ubuntu:
  New
Status in lxc-android-config package in Ubuntu:
  New
Status in ubuntu-touch-meta package in Ubuntu:
  Confirmed

Bug description:
  Snappy heavily rely on systemd system session and xenial has systemd
  by default.

  [steps to construct systemd-based avila]

  1. flash images built from xenial branch [1] (need manually checkout
  xenial branch in kernel-3.10/ before
  https://code.launchpad.net/~vicamo/avila-
  private/+git/platform_manifest/+merge/306441 is merged). This should
  gives a working xenial+upstart avila.

  2. Install systemd-sysv rather than upstart-sysv (Bug 1625023)
  2.1. rebuild latest ubuntu-touch package from source [2] with patch [3] applied.
  2.2. download latest systemd-sysv package [4].
  2.3. dpkg -i ubuntu-touch_*.deb systemd-sysv_*.deb

  3. Install android-tools-adbd for systemd (Bug 1625023)
  3.1. download prebuilt package [5] or recompile it from source [6] with patch [7] applied.
  3.2. Install the package from Terminal app because it will break adb connection and interrupt the installation process leaving a very bad state of the package.

  4. Install prebuilt lxc-android-config package [8] or just correct its
  systemd service file by hand as the merge proposal [9] does. (Bug
  1625445 and bug 1625916).

  5. Rename alsactl somewhere (Bug 1626012).
  # sudo mount -o remount,rw /
  # sudo mv /usr/sbin/alsactl /usr/sbin/alsactl.orig
  # sudo ln -s /bin/true /usr/sbin/alsactl

  6. Reboot.

  [1]: https://code.launchpad.net/~avila-private-team/avila-private/+git/platform_manifest/+ref/xenial
  [2]: http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/pool/main/u/ubuntu-touch-meta/
  [3]: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1625023/+attachment/4744047/+files/0001-depends-on-systemd-sysv-instead.patch
  [4]: http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/pool/main/s/systemd/
  [5]: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1625023/+attachment/4744111/+files/android-tools-adbd_5.1.1r36+git20160322-0ubuntu3.1~overlay1_arm64.deb
  [6]: http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/pool/main/a/android-tools/
  [7]: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1625023/+attachment/4746154/+files/force-adbd.patch
  [8]: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1625023/+attachment/4746148/+files/lxc-android-config_0.230+16.04.20160728-0ubuntu1_all.deb
  [9]: https://code.launchpad.net/~vicamo/lxc-android-config/fix-systemd-service-startup/+merge/306435

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