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Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from stretch-backports.

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Le mardi 18 février 2020 14:50:04 UTC+1, Nektarios Katakis a écrit :
> Στις 2020-02-18 12:41, Anastasios Lisgaras έγραψε:
[...]
[...]
> > Thank you for your answer. About "backports firmwares" what should I 
> > do?
> > What do you have to recommend me?
> > ( I didn't know that at all )

cf https://wiki.debian.org/Firmware

I think that the only firmwares installed are those you installed yourself manually (if any), no one is automatically pulled by default.
as root:
# aptitude search firmware
would display most of the firmwares (it's a search by names containing 'firmware' and some firmwares do not contain 'firmware' in their name). The status 'ii' means a firmware is installed. 

What I meant previously is that it is preferable to have a firmware (related to a hardware) that is coherent with the driver for this hardware included in the kernel. So if you have a hardware that needs a firmware and you use a Backports kernel, it is probably preferable to install the Backports version of the needed firmware. 

> > Finally, a very important question:
> > Can I go back to where I was before the update ( with only stretch
> > source ) ?
> 
> You should definitely be able to do this since the `apt upgrade` command 
> you
> ran ended without any errors (your system is not broken anyhow).
> 
> > I mention this because the official documentation itself (and you)
> > states that you do not recommend what I did.
> > 
> > There is a way to "I pull a rope" and go back to my sturdy/robust port
> > of stretch repositories/resources ?
> 
> Simply revert the changes sources (apt edit-sources) and
> `apt update && apt upgrade`
[...]

I do not think this will do the trick: if I recall correctly, it will end up with Backports packages marked something like 'local' or 'obsolete' without being downgraded to their Strech version. 

The best solution would probably to do a fresh install.
But if you want to take the chance, here is a trick to downgrade:
 https://wiki.debian.org/SystemDowngrade

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Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Nektarios Katakis <nektarios@mail.nektarioskatakis.xyz> - 2020-02-17 15:40 +0100
  Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. didier.gaumet@gmail.com - 2020-02-17 18:10 +0100
    Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Nektarios Katakis <nektarios@mail.nektarioskatakis.xyz> - 2020-02-18 14:50 +0100
      Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from stretch-backports. David Anthony <david.fosdick.anthony@gmail.com> - 2020-02-19 02:40 +0100
        Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Charles Curley <charlescurley@charlescurley.com> - 2020-02-19 07:00 +0100
      Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. didier.gaumet@gmail.com - 2020-02-19 12:00 +0100
        Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from   stretch-backports. Nektarios Katakis <nektarios@mail.nektarioskatakis.xyz> - 2020-02-19 12:20 +0100
          Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Jonas Smedegaard <jonas@jones.dk> - 2020-02-19 12:40 +0100
        Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Greg Wooledge <wooledg@eeg.ccf.org> - 2020-02-19 14:50 +0100
      Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. mick crane <mick.crane@gmail.com> - 2020-02-19 13:20 +0100
        Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Greg Wooledge <wooledg@eeg.ccf.org> - 2020-02-19 14:50 +0100
          Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Anastasios Lisgaras <tasosnumberten@yahoo.gr> - 2020-02-22 11:50 +0100
            Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. didier.gaumet@gmail.com - 2020-02-22 19:30 +0100
              Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Anastasios Lisgaras <tasosnumberten@yahoo.gr> - 2020-02-22 20:30 +0100
                Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. didier.gaumet@gmail.com - 2020-02-22 23:10 +0100
                Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. Anastasios Lisgaras <tasosnumberten@yahoo.gr> - 2020-02-23 00:40 +0100
                Re: Debian GNU/Linux 9 (stretch) was broken after upgraded from  stretch-backports. didier.gaumet@gmail.com - 2020-02-23 11:20 +0100

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