update-manager stuck when upgrading mysql-server

[Walter Garcia-Fontes]

During the last update of my system, done at the command line with "sudo apt.-get upgrade", the process got stuck when updating mysql-server at this line:

Setting up mysql-server-5.5 (5.5.28-0ubuntu0.12.10.2) ...

After waiting 10 minutes nothing happened.

A workaround:

From another terminal I entered: sudo service mysql stop

and the process continued after showing the following line:

mysql stop/post-start, process 21080
 post-start process 21081

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: update-manager 1:0.174.3
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Aptdaemon:

Architecture: amd64
Date: Tue Dec 11 08:32:25 2012
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1347268342'
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'621'
 b'com.ubuntu.update-manager' b'window-width' b'600'
InstallationDate: Installed on 2010-10-25 (777 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to quantal on 2012-09-10 (91 days ago)

[Walter Garcia-Fontes (walter-garcia)]

Now it happened to me again while upgrading from 12.10 to 13.04. Mysql is not stopped by updata-manager to install the new version.