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

[scx]

> right, I think the default driver should still be i965 for the
backport, as TGL support isn't a priority

I agree that i965 should be the default driver.
There is a bug in xf86-video-intel (xserver-xorg-video-intel). It leads to iris crashes when DRI2 and the intel DDX driver (instead of modesetting) are in use.
https://github.com/flatpak/flatpak/issues/3673#issuecomment-656688063

Almost all current Linux distributions are affected (including Fedora Rawhide and openSUSE Tumbleweed). Basically, everything that uses xf86-video-intel (xserver-xorg-video-intel) older than 2 months (or without patch) is affected.
https://src.fedoraproject.org/rpms/xorg-x11-drv-intel/blob/2501bf9ac2a756f333a6852309eb745e6b9d6861/f/xorg-x11-drv-intel.spec#_3
https://build.opensuse.org/package/view_file/openSUSE:Factory/xf86-video-intel/xf86-video-intel.spec?rev=82

To fix it, please make sure that you have applied this patch:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-intel/-/commit/f2a54e256dd7539633c476a379db2b1e60eec811

Related issues in EL and Fedora:
- EL7: https://bugzilla.redhat.com/show_bug.cgi?id=1854674
- EL8: https://bugzilla.redhat.com/show_bug.cgi?id=1856738
- FC32: https://bugzilla.redhat.com/show_bug.cgi?id=1854672

See also:
https://github.com/widelands/widelands/issues/3937
https://github.com/flatpak/flatpak/issues/3673
https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/issues/1071
https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/merge_requests/2927#note_375652460
https://gitlab.freedesktop.org/mesa/mesa/-/issues/3188


** Bug watch added: github.com/flatpak/flatpak/issues #3673
   https://github.com/flatpak/flatpak/issues/3673

** Bug watch added: Red Hat Bugzilla #1854674
   https://bugzilla.redhat.com/show_bug.cgi?id=1854674

** Bug watch added: Red Hat Bugzilla #1856738
   https://bugzilla.redhat.com/show_bug.cgi?id=1856738

** Bug watch added: Red Hat Bugzilla #1854672
   https://bugzilla.redhat.com/show_bug.cgi?id=1854672

** Bug watch added: github.com/widelands/widelands/issues #3937
   https://github.com/widelands/widelands/issues/3937

** Bug watch added: gitlab.com/freedesktop-sdk/freedesktop-sdk/-/issues #1071
   https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/issues/1071

** Bug watch added: gitlab.freedesktop.org/mesa/mesa/-/issues #3188
   https://gitlab.freedesktop.org/mesa/mesa/-/issues/3188

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https://bugs.launchpad.net/bugs/1876882

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

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]

  mesa and libclc will migrate to llvm-10 in a separate upload

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