apt wants to downgrade packages with pin-priority less than 1000
Firstly, let me introduce myself, I am one of the developers for TurnKey
Linux, an opensource project that develops a family of lightweight
installable Ubuntu based Live CD appliances optimized for various
Now, down to business...
apt will attempt to downgrade an installed package if the pin-priority
of the package is greater than 99.
apt will not downgrade when pin-priorty is 99 or below because the
already installed package automatically gets a priority of 100.
According to the apt_preferences manpage (mentioned several times), apt
will *never* downgrade a package unless the priority of an available
version exceeds 1000.
I came across this issue because our package repository has not yet been
updated with the latest package, but the latest package has been
installed on the system.
Although this shouldn't matter, apt seems to be breaking its own rules
(unless I am missing something...)
My testing system:
Ubuntu 8.04.1 (Hardy)
apt 0.7.9ubuntu17.1 for i386 compiled on Oct 27 2008 18:11:08