On a laptop with both integrated Intel and an Nvidia card, Kwin cannot enable OpenGL compositing on the Nouveau driver. OpenGL compositing also works when using the integrated Intel. OpenGL compositing also used to work with the Nvidia drivers, but broke sometime this year. Devices: $ xrandr --listproviders Providers: number : 2 Provider 0: id: 0x86 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 3 outputs: 4 associated providers: 1 name:modesetting Provider 1: id: 0x5f cap: 0x5, Source Output, Source Offload crtcs: 0 outputs: 0 associated providers: 1 name:nouveau Kwin started under Nouveau: $ DRI_PRIME=1 kwin --replace & [3] 1864 alex@debian:~$ OpenGL vendor string: nouveau OpenGL renderer string: NV108 OpenGL version string: 4.3 (Core Profile) Mesa 17.3.0-rc5 OpenGL shading language version string: 4.30 Driver: Unknown GPU class: Unknown OpenGL version: 4.3 GLSL version: 4.30 Mesa version: 17.3 X server version: 1.19.5 Linux kernel version: 4.13 Requires strict binding: no GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no kwin_core: Failed to initialize compositing, compositing disabled QXcbConnection: XCB error: 3 (BadWindow), sequence: 3127, resource id: 192, major code: 3 (GetWindowAttributes), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 3128, resource id: 192, major code: 14 (GetGeometry), minor code: 0 Support information: $ qdbus org.kde.KWin /KWin supportInformation Version ======= KWin version: 5.10.5 Qt Version: 5.9.1 Qt compile version: 5.9.1 XCB compile version: 1.12 Operation Mode: X11 only Build Options ============= KWIN_BUILD_DECORATIONS: yes KWIN_BUILD_TABBOX: yes KWIN_BUILD_ACTIVITIES: yes HAVE_INPUT: yes HAVE_DRM: yes HAVE_GBM: yes HAVE_X11_XCB: yes HAVE_EPOXY_GLX: yes HAVE_WAYLAND_EGL: yes X11 === Vendor: The X.Org Foundation Vendor Release: 11905000 Protocol Version/Revision: 11/0 SHAPE: yes; Version: 0x11 RANDR: yes; Version: 0x14 DAMAGE: yes; Version: 0x11 Composite: yes; Version: 0x4 RENDER: yes; Version: 0xb XFIXES: yes; Version: 0x50 SYNC: yes; Version: 0x31 GLX: yes; Version: 0x0 Decoration ========== Plugin: org.kde.breeze Theme: Blur: 0 onAllDesktopsAvailable: false alphaChannelSupported: false closeOnDoubleClickOnMenu: false decorationButtonsLeft: 0, 2 decorationButtonsRight: 6, 3, 4, 5 borderSize: 0 gridUnit: 10 font: Noto Sans,10,-1,5,50,0,0,0,0,0,Regular smallSpacing: 2 largeSpacing: 10 Options ======= focusPolicy: 1 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 750 delayFocusInterval: 100 shadeHover: false shadeHoverInterval: 250 separateScreenFocus: false placement: 4 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false rollOverDesktops: true focusStealingPreventionLevel: 2 legacyFullscreenSupport: false operationTitlebarDblClick: 5000 operationMaxButtonLeftClick: 5000 operationMaxButtonMiddleClick: 5015 operationMaxButtonRightClick: 5014 commandActiveTitlebar1: 0 commandActiveTitlebar2: 30 commandActiveTitlebar3: 2 commandInactiveTitlebar1: 4 commandInactiveTitlebar2: 30 commandInactiveTitlebar3: 2 commandWindow1: 7 commandWindow2: 8 commandWindow3: 8 commandWindowWheel: 31 commandAll1: 10 commandAll2: 3 commandAll3: 14 keyCmdAllModKey: 16777250 showGeometryTip: false condensedTitle: false electricBorderMaximize: true electricBorderTiling: true electricBorderCornerRatio: 0.25 borderlessMaximizedWindows: false killPingTimeout: 5000 hideUtilityWindowsForInactive: true inactiveTabsSkipTaskbar: false autogroupSimilarWindows: false autogroupInForeground: true compositingMode: 1 useCompositing: true compositingInitialized: true hiddenPreviews: 1 glSmoothScale: 2 xrenderSmoothScale: false maxFpsInterval: 16666666 refreshRate: 0 vBlankTime: 6000000 glStrictBinding: true glStrictBindingFollowsDriver: true glCoreProfile: true glPreferBufferSwap: 101 glPlatformInterface: 2 windowsBlockCompositing: true Screen Edges ============ desktopSwitching: false desktopSwitchingMovingClients: false cursorPushBackDistance: 1x1 timeThreshold: 150 reActivateThreshold: 350 actionTopLeft: 0 actionTop: 0 actionTopRight: 0 actionRight: 0 actionBottomRight: 0 actionBottom: 0 actionBottomLeft: 0 actionLeft: 0 Screens ======= Multi-Head: no Active screen follows mouse: yes Number of Screens: 2 Screen 0: --------- Name: VGA-1 Geometry: 1920,0,2048x1152 Refresh Rate: 59.9087 Screen 1: --------- Name: eDP-1 Geometry: 0,0,1920x1080 Refresh Rate: 60.0073 Compositing =========== Compositing is not active
I'm sorry but this is a rather corner case setup and we don't implement new features on X11.
(In reply to Martin Flöser from comment #1) > I'm sorry but this is a rather corner case setup and we don't implement new > features on X11. Not to disagree with the wontfix solution, but what is the new feature that should be implemented?
> Not to disagree with the wontfix solution, but what is the new feature that > should be implemented? The new feature in this case would be prime support.