On 01/02/2025 02:34, Eddie wrote:
In Synaptic go to "Settings" - 'Preferences" - "Distributions"
then select "Prefer Versions From" - backports
Do not do it. It is not a supposed way to use backports.
<https://backports.debian.org/>
It is therefore recommended to only select single backported packages
that fit your needs, and not use all available backports.
I do not use Synaptic, but from another message in this thread I suspect
that it sets APT::Default-Release somewhere in /etc/apt/apt.conf or
/etc/apt/apt.conf.d/. This is a deprecated setting with some non-obvious
pitfalls:
<https://wiki.debian.org/AptConfiguration#Be_careful_with_APT::Default-Release>
For those who followed the suggestion, I recommend to inspect
/etc/apt/apt.conf and /etc/apt/apt.conf.d/ and to *remove* the
APT::Default-Release line. I would not be surprised if attempts to
change the setting from GUI may just change value instead of removing it
completely from config.
If some equivalent of "apt upgrade" has been executed since setting
default release to backports then the following command should report
much more packages than intentionally installed from backports and their
dependencies):
apt list '?narrow(~i,~Astable-backports)'
You may miss security updates from the bookworm-security repository.
(Check that it is present in "apt policy" output.)
Roger, you likely did not do an action similar to "apt update" after
adding the backports repository.
