Yeah, I was confused by this at first too. Here's a hint, try "apt-mark showhold":
$ apt-mark showhold
$
If nothing is printed (as above), then the "issue" PRESUMABLY isn't local to your system; ergo, the cause is PROBABLY at the server, such as a phased update. Relax. It will probably sort itself out in a few days. (This hint is from https://askubuntu.com/questions/640986/how-to-get-a-list-of-installed-packages-held-back-from-upgrade "How to get a list of installed packages held back from upgrade?" (APT, etc., experts can please correct).)
As per above (#3), whilst the reason isn't stored, that does not mean apt(8)'s message cannot be improved. For example, instead of the current:
The following packages have been kept back:
PKG...
better might be something like:
The following packages have been kept back:
PKG...
Some or all of those packages may be deliberately "on hold" on the server;
please see manual page XXX(N) for information.
with (obviously) appropriate text in the manual page. (Exactly which man page is left to the experts.)
Yeah, I was confused by this at first too. Here's a hint, try "apt-mark showhold":
$ apt-mark showhold
$
If nothing is printed (as above), then the "issue" PRESUMABLY isn't local to your system; ergo, the cause is PROBABLY at the server, such as a phased update. Relax. It will probably sort itself out in a few days. (This hint is from https:/ /askubuntu. com/questions/ 640986/ how-to- get-a-list- of-installed- packages- held-back- from-upgrade "How to get a list of installed packages held back from upgrade?" (APT, etc., experts can please correct).)
As per above (#3), whilst the reason isn't stored, that does not mean apt(8)'s message cannot be improved. For example, instead of the current:
The following packages have been kept back:
PKG...
better might be something like:
The following packages have been kept back:
PKG...
Some or all of those packages may be deliberately "on hold" on the server;
please see manual page XXX(N) for information.
with (obviously) appropriate text in the manual page. (Exactly which man page is left to the experts.)