[Bug 1876882] Re: Backport packages for 18.04.5 HWE stack

[kisak]

Hello Mr. Aaltonen, Mr. Zemczak,

Per the distro packaging guidelines for Intel/Iris [1], please add
libepoxy 1.5.4-1 to the set of packages to backport to bionic in this
set and build the xorg packages against it instead of the older
libepoxy. This is to avoid a mixed i965+iris driver situation that is
not recommended.

Alternatively, mesa's debian/rules can be adjusted by adding
`confflags_GALLIUM += -Dprefer-iris=false` immediately after
`GALLIUM_DRIVERS += iris,` to avoid the dependency bump and retain i965
as the default OpenGL driver for all Intel hardware like previous mesa
builds for 18.04.

[1] https://lists.freedesktop.org/archives/mesa-
dev/2020-January/224027.html

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Title:
  Backport packages for 18.04.5 HWE stack

Status in libclc package in Ubuntu:
  Invalid
Status in libdrm package in Ubuntu:
  Invalid
Status in llvm-toolchain-10 package in Ubuntu:
  Invalid
Status in mesa package in Ubuntu:
  Invalid
Status in xorg-server-hwe-18.04 package in Ubuntu:
  Invalid
Status in xserver-xorg-video-amdgpu-hwe-18.04 package in Ubuntu:
  Invalid
Status in xserver-xorg-video-ati-hwe-18.04 package in Ubuntu:
  Invalid
Status in libclc source package in Bionic:
  New
Status in libdrm source package in Bionic:
  Fix Committed
Status in llvm-toolchain-10 source package in Bionic:
  New
Status in mesa source package in Bionic:
  New
Status in xorg-server-hwe-18.04 source package in Bionic:
  New
Status in xserver-xorg-video-amdgpu-hwe-18.04 source package in Bionic:
  New
Status in xserver-xorg-video-ati-hwe-18.04 source package in Bionic:
  New

Bug description:
  [Impact]

  These are needed for 18.04.5 images.

  [Test case]

  Boot a daily image, see that it still has the necessary stack
  installed and working.

  Check upgrade from stock bionic.

  [Regression potential]

  libdrm: very minimal chance for regressions

  llvm-10: a new package, no regression potential on it's own

  libclc: more or less just adds support for new llvm

  mesa: a new major release, but we'll pull the final stable release of
  20.0.x series, so there shouldn't be any regressions left at that
  point

  xserver: a new point-release

  xorg drivers: modest updates, if any

  [Other info]

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