Public bug reported:
The wifi firmware blobs in linux-firmware-raspi have a complex state:
several duplicate files in linux-firmware and thus the package places a
ton of dpkg-diversions to ensure the -raspi variants take precedence.
Furthermore, the firmware for the 43455 (used on the 3+, 4, and 5
boards) is *also* subject to an update-alternatives link. This works in
the produced images (both plucky and questing have the correct link in
place) but on upgrade from plucky to questing (from 12-0ubuntu1 to
13-0ubuntu1), which also involves correction of the aliased paths (/lib
-> /usr/lib) used by both the diversions *and* the alternatives
configuration, the installation breaks.
Specifically, the result is that although the diversion of
/usr/lib/firmware/cypress/cyfmac43455-sdio.bin.zst remains in place in
the dpkg configuration, the alternatives link is deleted, and the linux-
firmware file winds up in its place (without the .distrib suffix which
should be there if the diversion was still working). Unfortunately at
this point, update-alternatives with --force is required to fix things,
but if this is done naively it destroys the copy of the firmware blob
from linux-firmware (instead of moving it to .distrib as should happen).
The d/rules file needs to grow some more logic to handle this complex
upgrade correctly.
** Affects: linux-firmware-raspi (Ubuntu)
Importance: High
Assignee: Dave Jones (waveform)
Status: Triaged
** Changed in: linux-firmware-raspi (Ubuntu)
Status: New => Triaged
** Changed in: linux-firmware-raspi (Ubuntu)
Importance: Undecided => High
** Changed in: linux-firmware-raspi (Ubuntu)
Assignee: (unassigned) => Dave Jones (waveform)
** Changed in: linux-firmware-raspi (Ubuntu)
Milestone: None => ubuntu-25.10
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https://bugs.launchpad.net/bugs/2126066
Title:
Upgrade to questing daily breaks wifi firmware blob
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