Bug#1028547: MT7921e firmware blob exists but is not found

[Jamie Wilkinson <jaq@debian.org>]

Thankyou for this part of your reply:

That's expected: no firmware is deployed at first, the kernel complains,
d-i notices, and deploys stuff if relevant firmware packages are found,
and reload the relevant modules. This reloading is what breaks the
kernel. See upstream bug report:

https://bugzilla.kernel.org/show_bug.cgi?id=216844

as that was an actually useful response, and explains why check-missing-firmware never got invoked.