[Bug 1929449] Re: do not allow upgrades to hirsute for Apple hardware

[Łukasz Zemczak]

Hello Brian, or anyone else affected,

Accepted ubuntu-release-upgrader into hirsute-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/ubuntu-release-upgrader/1:21.04.12 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
hirsute to verification-done-hirsute. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-hirsute. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: ubuntu-release-upgrader (Ubuntu Hirsute)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-hirsute

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https://bugs.launchpad.net/bugs/1929449

Title:
  do not allow upgrades to hirsute for Apple hardware

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid
Status in ubuntu-release-upgrader source package in Hirsute:
  Fix Committed

Bug description:
  Due to LP: #1928434 release upgrades to Hirsute are not currently
  enabled for any one. However, the release upgrade process is safe for
  most systems so we should create a distribution upgrade quirk which
  prevents upgrades to Hirsute which is hardware specific.

  [Test Case]
  1) On Apple hardware running Ubuntu 20.10 download the release-upgrader tarball from -proposed (http://archive.ubuntu.com/ubuntu/dists/hirsute-proposed/main/dist-upgrader-all/current/hirsute.tar.gz) [This is necessary because upgrades to hirsute aren't enabled yet.]
  2) Extract the tarball
  3) Run './hirsute --frontend DistUpgradeViewGtk3'
  4) Observe a message regarding upgrades not being enabled for Apple hardware and the upgrade exit
  5) Run './hirsute --frontend DistUpgradeViewText' and ensure the same message appears.

  This should also be tested on not Apple hardware to ensure that
  upgrades can proceed for those systems.

  [Where Problems Could Occur]
  The _test_and_fail_on_apple() also will prevent upgrades for systems where /sys/lcass/dmi/id/sys_vendor does not exist which is a new situation. However, until the shim bug is resolved that seems like the safest option for users. After the shim bug is resolved we'll disable this specific quirk.

  Additionally, if the quirk is poorly written it could disallow all
  upgrades but we are testing for this by testing it on non-Apple
  hardware.

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