Comment 2 for bug 349469

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Till Kamppeter (till-kamppeter) wrote : Re: package cups 1.3.9-2ubuntu8 failed to install/upgrade: subprocess post-installation script returned error exit status 1

Looks like that all packages which use debconf are affected here. Perhaps apt or dpkg should check whether /var/cache/debconf/config.dat is locked before starting an update.

Setting up ufw (0.23.3) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing ufw (--configure):
 subprocess post-installation script returned error exit status 1
Setting up cups (1.3.9-2ubuntu8) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing cups (--configure):
 subprocess post-installation script returned error exit status 1