Re: apt upgrade

[Jeffrey Walton <noloader@gmail.com>]

On Fri, Nov 21, 2025 at 4:39 PM David Wright <deblis@lionunicorn.co.uk> wrote:
>
> On Fri 21 Nov 2025 at 15:00:39 (-0500), Jeffrey Walton wrote:
> > On Fri, Nov 21, 2025 at 2:10 PM mick.crane <mick.crane@gmail.com> wrote:
> > >
> > > updating and upgrading Trixie with apt there was a message about can't
> > > find the headers not installing modules. Reboot and X won't start with
> > > the new kernel. Installing the headers and re-installing the kernel
> > > installed the modules,likely for nvidia-driver, and seems to have solved
> > > the issue.
> > > Is there an apt line that says install the headers if going to need them
> > > or are you supposed to check which kernel might be installed and get the
> > > headers before upgrading?
> >
> > As Šarūnas said, the two packages of interest on Debian are
> > linux-image-amd64 and linux-headers-amd64.  I even go so fars as to
> > apt-mark them as automatic:
> >
> >     apt-get install -y linux-image-amd64 linux-headers-amd64
> >     apt-mark auto linux-image-amd64 linux-headers-amd64
>
> Hmm. My reading of APT's autoremove is that marking these packages
> as auto makes them /more/ vulnerable to autoremoval, not less.
> According to the docs:
>
>   "Packages which you have installed explicitly via install
>    are also never proposed for automatic removal."

Yeah, I do that because Debian marks the packages it installs as auto.
Also see `apt-mark showauto` and `apt-mark showmanual`.

Jeff