** Description changed:
+ [Impact]
+ gnome-shell gets removed on upgrades of gnome-shell and mutter if due to
phasing we can only upgrade src:gnome-shell.
+
+ [Test plan]
+ This adds a minimal test case to the test suite that reproduced the issue and
verifies the fix, test plan consists of the autopkgtests.
+
+ [Where problems could occur]
+ We could see a resurgence of bugs like LP#1990586 where the solver failed to
run at all because things got too complex, however this is a bit more unlikely
as we now use the by-keep resolver to handle rolling back phased updates.
+
+ [Other Info]
+ gnome-shell Depends: gnome-shell-common (= ${binary-Version), mutter (>=
matching)
+
+ So when mutter cannot be updated due to phasing, gnome-shell becomes
+ non-installable, but gnome-shell-common can be updated, so APT decided
+ to remove gnome-shell and the meta packages in its infinite wisdom.
+
+ The fix addresses this by resolving the dist-upgrade as if there were no
+ phasing, and then retroactively marks phases for keep and then anything
+ broken by that for keep.
+
+ This required some restructuring because normally we'd also keep broken
+ Recommends back, but here dist-upgrade may have decided that was ok, so
+ we need to build an allowlist of where Recommends can be broken to avoid
+ undoing unrelated changes.
+
+ [Original bug report]
+
This morning I got surprised by my laptop booting to a tty instead of a
desktop environment. It turned out that the entire desktop environment
was no longer present on my machine. Doing an apt install ubuntu-
desktop-minimal resolved the issue.
The machine had been running for a while. Looking at the apt logs, it
looks like apt deleted ubuntu-desktop on its own during a dist-upgrade a
couple of weeks back.
Start-Date: 2023-06-08 14:20:46
Commandline: apt dist-upgrade
Requested-By: alex (1000)
Upgrade: gnome-shell-common:amd64 (44.0-2ubuntu3, 44.1-0ubuntu1)
Remove: gnome-shell:amd64 (44.0-2ubuntu3), ubuntu-desktop:amd64 (1.501),
gdm3:amd64 (44.0-1ubuntu1), gnome-shell-extension-desktop-icons-ng:amd64
(46+really47.0.2-3), gnome-shell-extension-appindicator:amd64 (53-1),
ubuntu-session:amd64 (44.0-1ubuntu1), gnome-shell-extension-manager:amd64
(0.4.0-1), gnome-shell-extension-ubuntu-dock:amd64 (79ubuntu2.23.04.1),
ubuntu-desktop-minimal:amd64 (1.501)
End-Date: 2023-06-08 14:20:48
I'm using the following version of Ubuntu:
Distributor ID: Ubuntu
Description: Ubuntu 23.04
Release: 23.04
Codename: lunar
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apt in Ubuntu.
https://bugs.launchpad.net/bugs/2025462
Title:
Apt deletes ubuntu-desktop during dist-upgrade
Status in apt package in Ubuntu:
In Progress
Status in apt source package in Jammy:
New
Status in apt source package in Kinetic:
New
Status in apt source package in Lunar:
New
Status in apt source package in Mantic:
In Progress
Bug description:
[Impact]
gnome-shell gets removed on upgrades of gnome-shell and mutter if due to
phasing we can only upgrade src:gnome-shell.
[Test plan]
This adds a minimal test case to the test suite that reproduced the issue and
verifies the fix, test plan consists of the autopkgtests.
[Where problems could occur]
We could see a resurgence of bugs like LP#1990586 where the solver failed to
run at all because things got too complex, however this is a bit more unlikely
as we now use the by-keep resolver to handle rolling back phased updates.
[Other Info]
gnome-shell Depends: gnome-shell-common (= ${binary-Version), mutter (>=
matching)
So when mutter cannot be updated due to phasing, gnome-shell becomes
non-installable, but gnome-shell-common can be updated, so APT decided
to remove gnome-shell and the meta packages in its infinite wisdom.
The fix addresses this by resolving the dist-upgrade as if there were
no phasing, and then retroactively marks phases for keep and then
anything broken by that for keep.
This required some restructuring because normally we'd also keep
broken Recommends back, but here dist-upgrade may have decided that
was ok, so we need to build an allowlist of where Recommends can be
broken to avoid undoing unrelated changes.
[Original bug report]
This morning I got surprised by my laptop booting to a tty instead of
a desktop environment. It turned out that the entire desktop
environment was no longer present on my machine. Doing an apt install
ubuntu-desktop-minimal resolved the issue.
The machine had been running for a while. Looking at the apt logs, it
looks like apt deleted ubuntu-desktop on its own during a dist-upgrade
a couple of weeks back.
Start-Date: 2023-06-08 14:20:46
Commandline: apt dist-upgrade
Requested-By: alex (1000)
Upgrade: gnome-shell-common:amd64 (44.0-2ubuntu3, 44.1-0ubuntu1)
Remove: gnome-shell:amd64 (44.0-2ubuntu3), ubuntu-desktop:amd64 (1.501),
gdm3:amd64 (44.0-1ubuntu1), gnome-shell-extension-desktop-icons-ng:amd64
(46+really47.0.2-3), gnome-shell-extension-appindicator:amd64 (53-1),
ubuntu-session:amd64 (44.0-1ubuntu1), gnome-shell-extension-manager:amd64
(0.4.0-1), gnome-shell-extension-ubuntu-dock:amd64 (79ubuntu2.23.04.1),
ubuntu-desktop-minimal:amd64 (1.501)
End-Date: 2023-06-08 14:20:48
I'm using the following version of Ubuntu:
Distributor ID: Ubuntu
Description: Ubuntu 23.04
Release: 23.04
Codename: lunar
To manage notifications about this bug go to:
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