[Debian-on-mobile-maintainers] Bug#1004447: Bug#1004447: Acknowledgement (modemmanager: Sierra Wireless EM7455 stops working after upgrade to 1.18.4-1 (stays in FCC lock))

[Guido Günther]

Hi Bjørn,
On Fri, Jan 28, 2022 at 08:49:27PM +0100, Bjørn Bürger wrote:
> Argh! Nevermind, just figured it out.
> 
> It's actually documented in the original NEWS file, but it's
> not very obvious to the user, why suddenly the modem disappears.
> 
> This is the solution:
> 
> ln -sft /etc/ModemManager/fcc-unlock.d
> /usr/share/ModemManager/fcc-unlock.available.d/*
> 
> and it's also documented quite nicely on the modemmanager.org
> website. Maybe debian should add a prominent Warning, because
> this will break modemmanager heavily for a lot of non-technical
> people:

Thanks for investigating! Since you know exactly what you were looking
for do you want to draft something for NEWS.Debian / README.Debian and
submit this at
https://salsa.debian.org/DebianOnMobile-team/modemmanager ? That would be great.

Cheers,
 -- Guido

> 
> ------------------------- cite from NEWS.gz ---------------------------
> 
> ModemManager 1.18.4
> -------------------------------------------
> 
>  * A new FCC unlock operation management via external scripts is introduced,
>    which will avoid to automatically unlock FCC locked devices unless the
> user
>    has configured the operation manually, or unless an official
> vendor-provided
>    FCC unlock tool is found in the system.
> 
>    Please refer to the following URL for full details:
>    https://modemmanager.org/docs/modemmanager/fcc-unlock/
> 
>    The following changes should be taken into account by distribution
> packagers:
>    ** A set of FCC unlock scripts named as the specific vendor 'vid' will be
>       installed in ${datadir}/ModemManager/fcc-unlock.available.d.
>    ** A set of symlinks is created named as the specific device 'vid:pid',
> and
>       pointing to the per-vendor 'vid' files, in the same location inside
>       ${datadir}.
>    ** A new ${sysconfdir}/ModemManager/fcc-unlock.d directory is created,
> where
>       users will manually install additional symlinks to the scripts shipped
> in
>       ${datadir}.
>    ** A new ${libdir}/ModemManager/fcc-unlock.d directory is created, where
>       vendors will install their own official FCC unlock tools.
>    ** Both fcc-unlock.d directories should be empty on a new install, and
> their
>       contents (if any) should not be removed on ModemManager upgrades.
> 
> -----------------------------------------------------------------------
> 
> Have a nice weekend.
> Bjørn
> 
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