** Also affects: mesa (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Changed in: mesa (Ubuntu Noble)
   Importance: Undecided => Medium

** Changed in: mesa (Ubuntu Noble)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/2075549

Title:
  Running gtk applications in compositor supporting only shared memory
  buffers does not work with zink

Status in mesa package in Ubuntu:
  Triaged
Status in mesa source package in Noble:
  Triaged

Bug description:
  [ Impact ]

  An application is not draw if using GL and running in a wayland
  compositor that doesn't support dmabuf (e.g. just shared memory).

  This is happening with amd graphics, but I've read of reports with
  intel.

  See: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11613
  Fixed by: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30479

  [ Test case ]

   1. Install weston compositor
   2. Install mesa-utils and gtk-4-examples
   3. In a terminal run:

    weston --renderer=pixman

   4.  In the weston terminal run:
       gtk4-demo
   4a. The application should start and show

   5.  In the weston terminal run:
       eglgears_wayland
   5a. The application should start and the gears spinning

  [ Regression potential ]

  swrast driver is used to render when proper hardware acceleration can
  be used instead.

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