[Bug 2083020] Re: Backport packages for 24.04.2 HWE stack

[Timo Aaltonen]

I've added a comment about meson conflicts.

thanks!

** Description changed:

  [Impact]
  The graphics HWE stack from oracular needs to be backported for 24.04.2
  
  libdrm
  - build-dep of mesa
  
  spirv-llvm-translator
  - build-dep of llvm
  
  llvm-toolchain-19
  - new source in noble
  - build-dep of mesa
  - required for new AMD platforms
  - needs two uploads:
    * 1st stage bootstrap build
    * 2nd stage after spirv-llvm-translator has built against 1st stage
  
  mesa
  - new major release (24.2.x)
  - new HW support, Lunar Lake, Battlemage..
  
- meson
+ meson-1.5
  - needed by mesa
+ - Conflicts/Replaces meson, because otherwise all of the python lib should be 
+   renamed, along with the includes etc so it's not a trivial amount of work
  - tests disabled because four irrelevant ones fail for some reason, doesn't
-   affect the mesa backport
+   affect the mesa backport
  
  [Test case]
  We want to cover at least 2-3 different, widely used and already previously supported GPU generations from both AMD and Intel which are supported by this release, as those are the ones that cover most bases; nouveau users tend to switch to the NVIDIA driver after installation. No need to test ancient GPU's supported by mesa-amber. And best to focus on the newer generations (~5y and newer) as the older ones are less likely to break at this point.
  - AMD: Vega, Navi1x (RX5000*), Navi2x (RX6000*), Navi3x (RX7000*)
  - Intel: gen9 (SKL/APL/KBL/CFL/WHL/CML), gen11 (ICL), gen12 (TGL/ADL/RKL/RPL/DG2)
  
  Install the new packages and run some tests:
  - check that the desktop is still using hw acceleration and hasn't fallen back to swrast/llvmpipe
  - run freely available benchmarks that torture the GPU (Unigine Heaven/Valley/Superposition)
  - run some games from Steam if possible
  
  and in each case check that there is no gfx corruption happening or
  worse.
  
  Note that upstream releases have already been tested for OpenGL and
  Vulkan conformance by their CI.
  
  [Where things could go wrong]
  This is a major update of Mesa, there could be regressions but we'll try to catch any with testing. And since it shares bugs with noble, we'd already know if there are serious issues.

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Title:
  Backport packages for 24.04.2 HWE stack

Status in libdrm package in Ubuntu:
  Invalid
Status in llvm-toolchain-19 package in Ubuntu:
  Invalid
Status in mesa package in Ubuntu:
  Invalid
Status in meson-1.5 package in Ubuntu:
  New
Status in spirv-llvm-translator-19 package in Ubuntu:
  Invalid
Status in libdrm source package in Noble:
  Fix Committed
Status in llvm-toolchain-19 source package in Noble:
  Fix Committed
Status in mesa source package in Noble:
  Confirmed
Status in meson-1.5 source package in Noble:
  Fix Committed
Status in spirv-llvm-translator-19 source package in Noble:
  New

Bug description:
  [Impact]
  The graphics HWE stack from oracular needs to be backported for 24.04.2

  libdrm
  - build-dep of mesa

  spirv-llvm-translator
  - build-dep of llvm

  llvm-toolchain-19
  - new source in noble
  - build-dep of mesa
  - required for new AMD platforms
  - needs two uploads:
    * 1st stage bootstrap build
    * 2nd stage after spirv-llvm-translator has built against 1st stage

  mesa
  - new major release (24.2.x)
  - new HW support, Lunar Lake, Battlemage..

  meson-1.5
  - needed by mesa
  - Conflicts/Replaces meson, because otherwise all of the python lib should be 
    renamed, along with the includes etc so it's not a trivial amount of work
  - tests disabled because four irrelevant ones fail for some reason, doesn't
    affect the mesa backport

  [Test case]
  We want to cover at least 2-3 different, widely used and already previously supported GPU generations from both AMD and Intel which are supported by this release, as those are the ones that cover most bases; nouveau users tend to switch to the NVIDIA driver after installation. No need to test ancient GPU's supported by mesa-amber. And best to focus on the newer generations (~5y and newer) as the older ones are less likely to break at this point.
  - AMD: Vega, Navi1x (RX5000*), Navi2x (RX6000*), Navi3x (RX7000*)
  - Intel: gen9 (SKL/APL/KBL/CFL/WHL/CML), gen11 (ICL), gen12 (TGL/ADL/RKL/RPL/DG2)

  Install the new packages and run some tests:
  - check that the desktop is still using hw acceleration and hasn't fallen back to swrast/llvmpipe
  - run freely available benchmarks that torture the GPU (Unigine Heaven/Valley/Superposition)
  - run some games from Steam if possible

  and in each case check that there is no gfx corruption happening or
  worse.

  Note that upstream releases have already been tested for OpenGL and
  Vulkan conformance by their CI.

  [Where things could go wrong]
  This is a major update of Mesa, there could be regressions but we'll try to catch any with testing. And since it shares bugs with noble, we'd already know if there are serious issues.

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