fvogt added a comment.
Not quite sure whether it's related to this change, but I tried to debug the failure to init the primary plane and found this: kwin_wayland_drm: Using Atomic Mode Setting. kwin_wayland_drm: Number of planes: 2 kwin_wayland_drm: Atomic init for plane: 26 kwin_wayland_drm: 26: type' (id 6): 1 kwin_wayland_drm: "type" has enums: QVector("Primary", "Cursor", "Overlay") kwin_wayland_drm: Test all 3 possible enums: kwin_wayland_drm: Enum 'Overlay': runtime-value = 0 kwin_wayland_drm: Enum 'Primary': runtime-value = 1 kwin_wayland_drm: Enum 'Cursor': runtime-value = 2 kwin_wayland_drm: => "type" with mapped enum value "Primary" [...] kwin_wayland_drm: Atomic init for plane: 27 kwin_wayland_drm: 27: type' (id 6): 2 kwin_wayland_drm: "type" has enums: QVector("Primary", "Cursor", "Overlay") kwin_wayland_drm: Test all 3 possible enums: kwin_wayland_drm: Enum 'Overlay': runtime-value = 0 kwin_wayland_drm: Enum 'Primary': runtime-value = 1 kwin_wayland_drm: Enum 'Cursor': runtime-value = 2 kwin_wayland_drm: => "type" with mapped enum value "Cursor" But then in initPrimaryPlane it is unable to find any plane with type == Primary. If I set a breakpoint on KWin::DrmPlane::type(), every single call returns ::Overlay as m_props[0] is nullptr. REPOSITORY R108 KWin BRANCH drm-property-safety REVISION DETAIL https://phabricator.kde.org/D8752 To: graesslin, #kwin, #plasma, fvogt, subdiff Cc: plasma-devel, kwin, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart