FFE: new upstream release 20.2 and migrate to llvm 11

[Timo Aaltonen]

Mesa 20.2.0 was released on Sep 28th a month late, but we still want it in 20.10. It's been in debian experimental since rc1. The packaging in debian also migrates to use llvm 11.

The risks involve graphical issues or even crashes when running more intense OpenGL/Vulkan apps like games. Running a desktop is a simple use-case and should work fine across the board. Upstream gitlab has a fairly extensive CI for various drivers, while Intel tests on their own CI. This means that any showstoppers should be shaken out already.

We will be able to pull maybe two point-releases before groovy is frozen, and then push more as an SRU.

I've tested 20.2.0 on Intel and AMD (RX 5700) and the latter too with some games, all good.

packages for groovy are available on ppa:canonical-x/x-staging

[Iain Lane (laney)]

Already said on IRC, but mentioning here for other RT members:

I'd like to see (1) an analysis of the risks of this update, and (2) a description of what testing you've done, please.

[Timo Aaltonen (tjaalton)]

This bug was fixed in the package mesa - 20.2.0-1

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mesa (20.2.0-1) experimental; urgency=medium

  * New upstream release.
  * control: Add libclang-cpp11-dev to build-depends. (Closes: #954849)

 -- Timo Aaltonen <email address hidden> Tue, 29 Sep 2020 11:07:13 +0300

mesa (20.2.0~rc4-2) experimental; urgency=medium

  * Migrate to llvm/clang-11.
  * path_max.diff: Updated. (Closes: #969040)

 -- Timo Aaltonen <email address hidden> Thu, 17 Sep 2020 12:07:08 +0300

mesa (20.2.0~rc4-1) experimental; urgency=medium

  * New upstream prerelease.
  * rules: Move radv rule up to fix build on non-intel archs.

 -- Timo Aaltonen <email address hidden> Fri, 04 Sep 2020 19:32:58 +0300

mesa (20.2.0~rc2-1) experimental; urgency=medium

  * New upstream release candidate.
  * rules: Get rid of trailing commas in *_DRIVERS options.
  * control: Bump libglvnd build-dep.
  * Update mesa-common-dev.docs.

 -- Timo Aaltonen <email address hidden> Fri, 14 Aug 2020 18:30:42 +0300