Created attachment 103888 [details] artifact How to reproduce : - move the window to the top right corner - drag it down along the right side Expected results : - the preview should be updated properly Actual Results : - the preview is not updated, or disappears. A copy of the window can appear on the background. It looks like the background is not refreshed. Reproducibility : - most of the time Additional info : - Intel GPU - it doesn't happen if I switch to Wayland or disable DRI3.
Created attachment 103889 [details] no preview
Please provide the output of: qdbus org.kde.KWin /KWin supportInformation
Created attachment 103891 [details] kwin support information
Version ======= KWin version: 5.9.0 Qt Version: 5.7.1 Qt compile version: 5.7.1 XCB compile version: 1.11.1 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: 11804000 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: true alphaChannelSupported: true closeOnDoubleClickOnMenu: false decorationButtonsLeft: 2 decorationButtonsRight: 6, 3, 4, 5 borderSize: 3 gridUnit: 10 font: Noto Sans,10,-1,0,50,0,0,0,0,0 smallSpacing: 2 largeSpacing: 10 Options ======= focusPolicy: 0 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: false shadeHoverInterval: 250 separateScreenFocus: false placement: 4 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false rollOverDesktops: true focusStealingPreventionLevel: 1 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: 16777251 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: false glPreferBufferSwap: 101 glPlatformInterface: 1 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: no Number of Screens: 1 Screen 0: --------- Name: VGA-1 Geometry: 0,0,1680x1050 Refresh Rate: 59.9543 Compositing =========== Compositing is active Compositing Type: OpenGL OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile OpenGL version string: 2.1 Mesa 11.2.0 OpenGL platform interface: GLX OpenGL shading language version string: 1.20 Driver: Intel GPU class: i965 OpenGL version: 2.1 GLSL version: 1.20 Mesa version: 11.2 X server version: 1.18.4 Linux kernel version: 4.4 Direct rendering: Requires strict binding: yes GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no OpenGL 2 Shaders are used Painting blocks for vertical retrace: no Loaded Effects: --------------- dimscreen zoom slidingpopups kwin4_effect_login kwin4_effect_windowaperture slide screenshot kwin4_effect_translucency minimizeanimation flipswitch desktopgrid coverswitch colorpicker kwin4_effect_maximize kwin4_effect_fade kwin4_effect_morphingpopups presentwindows highlightwindow kwin4_effect_dialogparent startupfeedback screenedge kscreen Currently Active Effects: ------------------------- Effect Settings: ---------------- dimscreen: zoom: zoomFactor: 1.2 mousePointer: 0 mouseTracking: 0 enableFocusTracking: false followFocus: true focusDelay: 350 moveFactor: 20 targetZoom: 1 slidingpopups: fadeInTime: 150 fadeOutTime: 250 kwin4_effect_login: kwin4_effect_windowaperture: slide: screenshot: kwin4_effect_translucency: minimizeanimation: flipswitch: tabBox: false tabBoxAlternative: false duration: 200 angle: 30 xPosition: 0.33000001311302185 yPosition: 1 windowTitle: true desktopgrid: zoomDuration: 300 border: 10 desktopNameAlignment: 0 layoutMode: 0 customLayoutRows: 2 usePresentWindows: true coverswitch: animationDuration: 200 animateSwitch: true animateStart: true animateStop: true reflection: true windowTitle: true zPosition: 900 primaryTabBox: false secondaryTabBox: false colorpicker: kwin4_effect_maximize: kwin4_effect_fade: kwin4_effect_morphingpopups: presentwindows: layoutMode: 1 showCaptions: true showIcons: true doNotCloseWindows: true ignoreMinimized: false accuracy: 20 fillGaps: true fadeDuration: 150 showPanel: false leftButtonWindow: 1 rightButtonWindow: 2 middleButtonWindow: 0 leftButtonDesktop: 2 middleButtonDesktop: 0 rightButtonDesktop: 0 highlightwindow: kwin4_effect_dialogparent: startupfeedback: type: 1 screenedge: kscreen:
which xorg driver are you using? Intel or modesettings?
I am using modesetting. The bug is also there with uxa and sna if I enable DRI3. There seems to be no problem with uxa and sna if I disable DRI3.
as tuning the Intel driver fixes the problem I unfortunately must say this is a driver issue. Ironlake is rather old and I doubt that it got adjusted to support DRI3 properly - it got introduced much later than Ironlake and Intel does not really provide newer features for older hardware.