Bug#1052227: bookworm-pu: mutter/43.8-0+deb12u1

[Simon McVittie]

Control: retitle -1 bookworm-pu: mutter/43.8-0+deb12u1

On Sun, 24 Sep 2023 at 11:31:45 +0100, Simon McVittie wrote:
> I have been asked to roll one additional change into this update: updating
> the (non-upstream) triple-buffering patch to its latest version

There have been a couple of further revisions to the triple-buffering
patchset since the version Adam saw, which are included in the version
that I have now uploaded:

    - Fix increased mouse input latency after resolving LP 2017137, LP 2017097
      (LP: #2023363)
    - Fix mouse cursor stuttering when moving across animated UI elements
      (LP: #2023766)

The new changes are attached. I have also switched from applying the
triple-buffering patchset as a single large patch to putting it in the
form of individual commits in debian/patches/triple-buffering/
(I verified that this did not change the patched tree), and re-worded
the changelog to expand on which patch does what and what newer versions
in unstable/experimental also have it.

An updated full debdiff between patched trees (12.2 to proposed version) is
also attached, filtered to exclude the patches themselves.

The version I uploaded is functionally equivalent to the one
labelled 69d27b60 in
<https://people.debian.org/~smcv/12.3/pool/main/m/mutter/>, which I've
been testing for about 2 weeks on my household's bookworm machines
with no obvious regressions. I have confirmed using debdiff that there is
no difference other than the changelog.

If the new changes cause any problems, then I can upload a 43.8-0+deb12u2
that reverts or adjusts them.

Thanks,
    smcv
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