Public bug reported:
I just upgraded from Ubuntu 24 to 26.4.01 LTS and it installed MySQL 8.4
in place of my existing MySQL 8.0
The new MySQL does not tolerate fields in existing tables with
FLOAT/DOUBLE and AUTO_INCREMENT on the same data, and it's not subtle
about it. The mysql server outright _will_not_start_ and there is no way
out at that point, short of going back to MySQL 8.0 for long enough to
change these tables to use integers for all AUTO_INCREMENT data fields.
End result is a dead LAMP stack on Ubuntu 26 "upgrade" as MySQL will not
start and "upgrade=MINIMAL" in my.cnf will not get me past the error
ProblemType: Package
DistroRelease: Ubuntu 26.04
Package: mysql-server 8.4.11-0ubuntu0.26.04.1
ProcVersionSignature: Ubuntu 6.8.0-146.146-generic 6.8.12
Uname: Linux 6.8.0-146-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Wed Sep 30 22:40:19 2026
ErrorMessage: old mysql-server package postinst maintainer script subprocess
failed with exit status 1
Logs.var.log.daemon.log:
Logs.var.log.mysql.error.log:
MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
MySQLConf.etc.mysql.my.cnf: my.cnf links to /etc/mysql/mysql.cnf
MySQLVarLibDirListing: ['#ib_16384_0.dblwr', 'DVComEverlast', 'DVComQline',
'ca.pem', 'DVComDemo', 'binlog.002563', '#ib_16384_1.dblwr',
'performance_schema', 'binlog.002568', 'mysql.ibd', 'jasperserver', 'sys',
'dvweb1', 'DVComNFLD', 'DVComAnig', 'DVComOntAL', 'dvweb0',
'opticut_DavinciCloud', 'ib_buffer_pool', 'dvweb', '#innodb_redo', 'auto.cnf',
'opticutca', 'server-cert.pem', 'DVComPortaMartini', 'phpmyadmin',
'acan2015be', 'DVComKV@002ddebug', 'binlog.002564', 'DVComLifestyle',
'DVComSealtech', 'debian-5.5.flag', '#innodb_temp', 'passwordGenerator',
'client-key.pem', 'DVComACVinyl', 'carlb-asusk52.pid', 'client-cert.pem',
'DVComKento', 'binlog.002565', 'undo_001', 'server-key.pem', 'DVComHometech',
'ibdata1', 'mysql_upgrade_info', 'DVComCoronet', 'mysql', 'DVComVista',
'DVComCanChoice', 'binlog.002566', 'binlog.002567', 'public_key.pem',
'private_key.pem', 'binlog.index', 'DVComBrookstone', 'undo_002',
'debian-5.7.flag', 'ca-key.pem', 'opticut_assets', 'DVComKV', 'zohooauth',
'DVComHT', 'DVComClera']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-6.8.0-146-generic
root=UUID=3206edcc-e9ed-41b3-854f-fe385d5437fc ro quiet splash vt.handoff=7
Python3Details: /usr/bin/python3.14, Python 3.14.4, python3-minimal,
3.14.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.18-9
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
dpkg 1.23.7ubuntu1
apt 3.2.0
SourcePackage: mysql-8.4
Title: package mysql-server 8.4.11-0ubuntu0.26.04.1 failed to install/upgrade:
old mysql-server package postinst maintainer script subprocess failed with exit
status 1
UpgradeStatus: Upgraded to resolute on 2026-10-01 (0 days ago)
modified.conffile..etc.mysql.mysql.cnf: [modified]
modified.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: [modified]
mtime.conffile..etc.mysql.mysql.cnf: 2024-04-24T14:01:51.360945
mtime.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: 2025-07-23T17:12:57.882404
** Affects: mysql-8.4 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-package need-duplicate-check resolute
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https://bugs.launchpad.net/bugs/2169178
Title:
package mysql-server 8.4.11-0ubuntu0.26.04.1 failed to
install/upgrade: old mysql-server package postinst maintainer script
subprocess failed with exit status 1
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