package mysql-server-5.7 5.7.11-0ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Yrjö Hatakka]

sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  php5-gd
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n]
Setting up mysql-server-5.7 (5.7.11-0ubuntu4) ...
Checking if update is needed.
This installation of MySQL is already upgraded to 5.7.11, use --force if you still need to run mysql_upgrade
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                          Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-server-5.7 5.7.11-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
Uname: Linux 4.4.0-17-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
Date: Wed Apr 6 21:59:46 2016
DuplicateSignature:
 Setting up mysql-server-5.7 (5.7.11-0ubuntu4) ...
 Checking if update is needed.
 This installation of MySQL is already upgraded to 5.7.11, use --force if you still need to run mysql_upgrade
 dpkg: error processing package mysql-server-5.7 (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2015-05-15 (327 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqld.safe.syslog.cnf:
 [mysqld_safe]
 syslog
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
MySQLVarLibDirListing: ['performance_schema', 'ib_buffer_pool', 'mysql', 'debian-5.6.flag', 'ib_logfile0', 'mail', 'ibtmp1', 'debian-5.7.flag', 'sys', 'debian-5.5.flag', 'roundcubedb', 'auto.cnf', 'ib_logfile1', 'mysql_upgrade_info', 'ibdata1']
ProcCmdline: BOOT_IMAGE=/vmlinuz-4.4.0-17-generic root=/dev/mapper/VG1-LV1 ro elevator=deadline biosdevname=0
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.11-0ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: Upgraded to xenial on 2016-02-13 (53 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.