[Bug 349469] Re: debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable

[Rune Philosof]

As in #111 but on 15.10.
I got this error after the "Add printer driver"-UI hanged while trying to add openprinting-gutenprint.

This is the process locking the config.dat:
        |-aptd-+-aptd-+-dpkg
        |      |      `-sh---dpkg-preconfigu---dpkg-preconfigu

I had tried to install the printer driver three times. 
So when I found this bug report two days later, I had to run `sudo fuser -vik /var/cache/debconf/config.dat` three times.
Apparently they were waiting in some queue and locked the file (and then hanged) when I kill the current locking process.

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https://bugs.launchpad.net/bugs/349469

Title:
  debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by
  another process: Resource temporarily unavailable

Status in Ambasa:
  New
Status in Debconf:
  New
Status in aptdaemon package in Ubuntu:
  Confirmed
Status in debconf package in Ubuntu:
  Triaged

Bug description:
  Upgrading packages that use debconf sometimes fail with the following
  error:

  debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by
  another process: Resource temporarily unavailable

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