package phpmyadmin 4:4.9.5+dfsg1-2 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 10

[VladC]

During Ubuntu upgrade from 18.04 to 20.04 phpmyadmin and mysql 8 failed after I failed to provide some password I guess. At the end of the upgrade it reported upgrade failure saying it will revert but did not.

After restart I had no login box, but after powering it off using the laptop button the login box was there. After login, mysql does not work and I got this error without accessing phpmyadmin.

More, ALT + TAB does not work anymore :)

$ lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

$ apt-cache policy phpmyadmin
phpmyadmin:
  Installed: 4:4.9.5+dfsg1-2
  Candidate: 4:4.9.5+dfsg1-2
  Version table:
 *** 4:4.9.5+dfsg1-2 500
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu focal/universe i386 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy mysql
N: Unable to locate package mysql

$ mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

I expected to have no issues after upgrade. I have upgraded Ubuntu (18 to 20) on another computer with a similar setup, but no phpmyadmin installed, and had no issues, everything went well.

Thank you!

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: phpmyadmin 4:4.9.5+dfsg1-2
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Apr 28 17:59:35 2020
ErrorMessage: installed phpmyadmin package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2018-03-05 (785 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2
SourcePackage: phpmyadmin
Title: package phpmyadmin 4:4.9.5+dfsg1-2 failed to install/upgrade: installed phpmyadmin package post-installation script subprocess returned error exit status 10
UpgradeStatus: Upgraded to focal on 2020-04-28 (0 days ago)

[William Desportes (williamdes)]

"More, ALT + TAB does not work anymore :)"

Could you open an issue at https://github.com/phpmyadmin/phpmyadmin/issues about this ?
I will be very glad to fix any new bug you found.

For the error I think that I can not do much more, unfortunately

I will ask someone to have a look

[William Desportes (williamdes)]

Matthias Blümel could you please give me some feedback on this one ?

[VladC (vladc)]

Thank you for such a quick reply.

I did the following:
* removed phpmyadmin (haven't used it in a while)
* purged and reinstalled mysql (kept all the settings, users, databases)
* found that the ALT + TAB shortcut was somehow removed during the upgrade so I added it back and it is working now

So now I can say that none of these problems are there anymore.

[William Desportes (williamdes)]

> So now I can say that none of these problems are there anymore.

This is very good news, I will close this bug.

Enjoy your upgrade :)