package mysql-server-5.7 5.7.22-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[biagiopas]

the problem occurs if I disable the start of the mysql service at boot time of the operating system:
sudo systemctl disable mysql.service

if I restore the mysql service startup at boot time of the operating system:
$ sudo systemctl enable mysql.service

then everything returns to work, and packeages ugrade without errors

no such problem with other services
sudo systemctl disable apache2.service
sudo systemctl disable bluetooth.service
. . .

only mysql has this problem

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-server-5.7 5.7.22-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-121.145-generic 4.4.117
Uname: Linux 4.4.0-121-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
Date: Tue May 8 14:18:49 2018
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-06-12 (694 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Logs.var.log.daemon.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.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-121-generic root=UUID=d796c8fe-53d6-4525-b6c9-f6a6ca02bd41 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.22-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.init.mysql.conf: [modified]
modified.conffile..etc.mysql.mysql.cnf: [modified]
modified.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: [modified]
mtime.conffile..etc.init.mysql.conf: 2017-07-03T20:08:19.249175
mtime.conffile..etc.mysql.mysql.cnf: 2016-08-08T17:44:32.147587
mtime.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: 2018-02-26T00:04:59.175061
upstart.mysql.override: manual

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1769593, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.