Comment 3 for bug 1821023

you first case (core 18 with core 16 base) is aligned with generic
statement at the end of the description

Though core 18 + core18 is surprising one. And I can confirm this is the
case. Just run test on core 18 + core 18 base and indeed /lib/firmware is
empty

On Wed, Mar 20, 2019 at 4:05 PM Alfonso Sanchez-Beato <
<email address hidden>> wrote:

> I see the same issue in the reverse case, Ubuntu Core 18 system and a
> snap with a core16 base. Even more, it looks like /lib/firmware is also
> bad for snaps with core18 base in UC18.
>
> --
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> report.
> https://bugs.launchpad.net/bugs/1821023
>
> Title:
> core18 base on core 16 missing firmware
>
> Status in Snappy:
> Triaged
>
> Bug description:
> snap version:
> snap 2.38~pre1+git1197.b5e5471~ubuntu16.04.1
> snapd 2.38~pre1+git1197.b5e5471~ubuntu16.04.1
> series 16
> kernel 4.4.0-143-generic
>
> Precondition:
> - Ubuntu Core 16 system
> - snap using base core 18
> - snap trying to load firmware file, e.g. wlan firmware
>
> Expected behaviour:
> - works
>
> Actual behaviour:
> - firmware file is missing
>
> Actually entire firmware directory from kernel snap is not mapped into
> core 18 base when on core 16 system
>
> I assume this be generalised as:
> When using base which has not been used as boot rootfs, kernel snap
> overlay is not applied. e.g, /lib/firmware, /lib/modules are empty
>
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