Pre-upload SRU review for the principle of this update

2.11 is ahead of Debian. The development release in Ubuntu only got this
support in July. This does not give me confidence that this is well
tested in the field, whether in Ubuntu or in the wider ecosystem. In
particular for wifi, there are compatibility concerns with a very wide
range of hardware out there.

> that will test the compatibility with MLO

Will you be testing *actual* function with MLO? If this is the reason
for the proposed SRU, I think you should be testing MLO extensively in
real world situations.

What about the test matrix for the various different wifi authentication
arrangements that wpa supports?

> The kernel is compatible with these since 24.04 (Noble)

Which kernel? The release kernel, HWE kernel or both? Your test plan
needs to be specific and comprehensive on kernel testing.

For _microrelease_ SRUs, we require:
https://documentation.ubuntu.com/sru/en/latest/reference/requirements/#new-
upstream-microreleases

Since this is a feature change, I'd expect something that like to be a
requirement, too. For wpa, a test suite seems difficult, but I think
it's worth analysing upstream code quality and quality history and what
they do manage in lieu of that. The previous  2:2.10- *24* is a red flag
here.

> [ Where problems could occur ]

A really big one here is that if we break a user, it is likely to be
very difficult for them to update to a regression fix with their wifi
broken.

A second one is that wifi configuration and hardware and therefore our
required compatibility matrix is much more varied than with an average
SRU.


I'm not completely opposed to an SRU for this in Noble's lifetime, but it seems 
premature at the moment. Perhaps doing this in noble-backports first would be a 
good start, so that users can opt-in, and we'll get a better picture of real 
world impact before risking wider regression across all users? The last thing 
we want is a wide swathe of users having wifi problems due to a hardware or 
configuration compatibility issue we didn't know about.

Given the current status of deployment of 2.11 across the ecosystem, I
don't think testing five hopefully different configurations is enough.

I mentioned earlier elsewhere that adding Wifi 7 sounds like a hardware
enablement. It does sound like something users might consider to be
towards the end of Noble's lifetime. But right now, I don't see much of
a compelling case for improvements in UX for Noble here, when balanced
against the risk.

** Summary changed:

- Upgrade to 2.11
+ No Wifi 7 MLO support

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https://bugs.launchpad.net/bugs/2117497

Title:
  No Wifi 7 MLO support

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