Oh, I do not need to do separate marking to auto. It seems like the apt
install command retains the auto status even if the auto packages are
listed in command line, if the package which depends on the auto
package, is installed, too. (at least with apt 1.6.12)
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Well, actually I have thought a lot about this downgrading thing. I have
contributed to ppa-purge and even made a PPA of that:
https://launchpad.net/~jarnos/+archive/ubuntu/ppa-purge
I still have to fix it to keep auto installed packages auto installed, which is
not very difficult.
I just
"apt install foo/bar" will try to satisfy dependencies of foo from
release bar if the current candidates do not satisfy the requirements.
That is more a feature for going to a PPA (or backports) than leaving it
and has some issues, but it exists (e.g. your downgrade has probably all
dependencies
Related Bug #107221
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https://bugs.launchpad.net/bugs/1857018
Title:
apt-get: Can not downgrade dependencies or anything with -t
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So there is no short way to downgrade the depending packages to the
versions available from the current repositories retaining packages'
auto/manual install status? That is something that needs to be done, if
one e.g. disables a PPA and wants to use the packages from the default
repositories,
The behaviour is correct. -t changes the default release, pinning the
argument to 990. This must not cause downgrades.
** Changed in: apt (Ubuntu)
Status: New => Invalid
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