Public bug reported:
I've just updated from Ubuntu 19.10 to Ubuntu 20.04 using the GUI
updater (after it popped up and told me there was an update available).
It started downloading all the new updates, then when configuring the
openssh-server, a new window popped up, telling me that the sshd_config
has been changed in the package, and whether I want to take the
maintainer's copy or keep my own one.
It gave me a couple of options, like keep maintainer one, keep my one,
three-way diff, and "open a shell to examine the situation". I wanted to
open a shell to take a look at both files - and then it froze. I
selected that option, confirmed, and nothing happened, but I also
couldn't cancel the process.
Looking at the output of pstree, the updater had started a nice new bash
instance for me to examine the situation in - but I had no way of
accessing that. The updater window didn't change, and no other new
terminal window with that bash popped up, so the update was softlocked.
I had to manually find and kill that bash process to make the softlock
go away (and then manually open a shell myself to look at the files),
which wasn't that big of a deal for me, but will probably be fairly
confusing for less experienced users.
I don't know if I made some mistake that made that error happen, but
then again there aren't that many things to do wrong performing an
update, right?
Unfortunately, I've now already updated to 20.04 so I can't include the
version of the update tool I had in 19.10 since that will probably have
changed by now. Currently, on 20.04, I have ubuntu-release-upgrader-core
and -gtk 1:20.04.19.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.19
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun May 10 10:14:10 2020
InstallationDate: Installed on 2019-08-17 (267 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2020-05-09 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade focal
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https://bugs.launchpad.net/bugs/1877835
Title:
"Shell to examine situation" during upgrade fails
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