The commit_timing wayland protocol will be required by Mesa to fully implement VK_EXT_present_timing [1], specifically it is required for the presentAtAbsoluteTimeSupported feature, which in turn will be required by vkd3d-proton [2] and presumably DXVK to finally properly implement DXGI's SyncInterval > 1. [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38770 [2] https://github.com/HansKristian-Work/vkd3d-proton/pull/2751
VK_EXT_present_timing support has been merged to upstream mesa: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38770
*** Bug 516067 has been marked as a duplicate of this bug. ***
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/8955
Git commit e29d8f841220cba2daf501e50dfa32ee335961d9 by Xaver Hugl. Committed on 08/09/2026 at 14:34. Pushed by zamundaaa into branch 'master'. wayland: support the commit-timing protocol This protocol allows applications to set the earliest time the compositor should apply the commit. It can be used for example by video players to schedule frames in advance, or to better control the refresh rate with adaptive sync. M +1 -0 autotests/integration/CMakeLists.txt M +12 -0 autotests/integration/kwin_wayland_test.h M +115 -2 autotests/integration/test_fifo.cpp M +24 -0 autotests/integration/test_helpers.cpp M +2 -2 src/core/outputlayer.cpp M +1 -1 src/core/outputlayer.h M +28 -6 src/scene/item.cpp M +6 -3 src/scene/item.h M +12 -2 src/scene/scene.cpp M +6 -1 src/scene/scene.h M +18 -1 src/scene/surfaceitem_wayland.cpp M +2 -0 src/scene/surfaceitem_wayland.h M +3 -0 src/scene/workspacescene.cpp M +3 -0 src/wayland/CMakeLists.txt A +76 -0 src/wayland/commit_timing_v1.cpp [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)] A +45 -0 src/wayland/commit_timing_v1.h [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)] M +44 -15 src/wayland/surface.cpp M +7 -1 src/wayland/surface.h M +7 -3 src/wayland/surface_p.h M +52 -25 src/wayland/transaction.cpp M +14 -8 src/wayland/transaction.h M +2 -0 src/wayland_server.cpp M +2 -0 src/wayland_server.h https://invent.kde.org/plasma/kwin/-/commit/e29d8f841220cba2daf501e50dfa32ee335961d9