[Bug 527275] Re: package mysql-server-5.1 5.1.41-3ubuntu7 failed to install/upgrade: subprocess installed post-installation script killed by signal (Interrupt)

[Wouter Deconinck]

I had the same problem.  In my case, it seems that the cause was that
apparmor was blocking mysql.  I had to run sudo aa-complain mysql before
I could finish the configuration.  I do not remember ever enabling aa-
enforce for mysql (or for anything else, in fact).

Steps to reproduce:
  sudo aa-enforce mysql
  sudo apt-get install --reinstall mysql-server-5.1

Result: apt-get will stall at
  Preconfiguring packages ...
  (Reading database ... 339276 files and directories currently installed.)
  Preparing to replace mysql-server-5.1 5.1.41-3ubuntu7 (using .../mysql-server-5.1_5.1.41-3ubuntu7_i386.deb) ...
while trying to execute 'stop mysql' in the prerm script.

Work-around:
  sudo aa-complain mysql
  sudo apt-get install --reinstall mysql-server-5.1
gives the expected result.

-- 
package mysql-server-5.1 5.1.41-3ubuntu7 failed to install/upgrade: subprocess installed post-installation script killed by signal (Interrupt)
https://bugs.launchpad.net/bugs/527275
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