** Summary changed:

- Compositing/Semitransparency of Plasma/Kwin broken using llvmpipe on x11 
since 24.2.2
+ Compositing/Semitransparency of Plasma/Kwin broken using llvmpipe on x11 
since mesa 24.2.2

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https://bugs.launchpad.net/bugs/2080620

Title:
  Compositing/Semitransparency of Plasma/Kwin broken using llvmpipe on
  x11 since mesa 24.2.2

Status in Mesa:
  New
Status in mesa package in Ubuntu:
  Confirmed

Bug description:
  Version: 24.2.2-1ubuntu1
  Release: oracular 24.10

  After upgrade to mesa 24.2.2-1ubuntu1 in oracular,
  compositing/semitransparency of Plasma/Kwin broken using llvmpipe on
  x11. Very noticeable on Plasma widgets/panels.

  This is particularly prominent for testers trying our live ISO session
  (is still X11 for compatibility) in VMs such as Virtualbox/qmemu/etc
  with no acceleration. With the 24.10 beta coming in less than a weeks
  time, this is bad timing.

  EDIT: Also as a result of this issue, the try/install screen on the
  live ISO session is wrongly tinted orange. This occurs under the same
  conditions as the transparency issue.

  An issue has been opened upstream by a user/developer on Mandriva with
  the same issue.

  https://gitlab.freedesktop.org/mesa/mesa/-/issues/11840#top

  Screen shots can be seen there of the impact. I have commented and
  added screenshots from Kubuntu 24.10.

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