Disabling Shaders or downgrading to mesa-9.0.x helps. When entering PW it seems like there is a lag of ~1second, the first hover animation comes delayed. Further interaction is not as smooth, sometimes animations get skipped, mouse hangs (cursor does not move). Reproducible: Always
Are you 100 % sure to run 4.10.1 and not 4.10.0? please run: qdbus org.kde.kwin /KWin supportInformation
Of course I am sure about the kwin version :) I also noticed that Task Switcher "Grid" and "Present Windows Clonse" are slow, too (invoking + leaving lags quite noticable), but "Cover switch" and "Flip Switch" are fast as ever. $ qdbus org.kde.kwin /KWin supportInformation KWin Support Information: The following information should be used when requesting support on e.g. http://forum.kde.org. It provides information about the currently running instance, which options are used, what OpenGL driver and which effects are running. Please post the information provided underneath this introductory text to a paste bin service like http://paste.kde.org instead of pasting into support threads. ========================== Version ======= KWin version: 4.10.1 KDE SC version (runtime): 4.10.1 KDE SC version (compile): 4.10.1 Qt Version: 4.8.4 Options ======= focusPolicy: 0 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: true shadeHoverInterval: 300 separateScreenFocus: false activeMouseScreen: false placement: 4 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false showDesktopIsMinimizeAll: false rollOverDesktops: true focusStealingPreventionLevel: 1 legacyFullscreenSupport: false operationTitlebarDblClick: 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 electricBorders: false electricBorderDelay: 150 electricBorderCooldown: 350 electricBorderPushbackPixels: 1 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 unredirectFullscreen: false glSmoothScale: 2 glVSync: true colorCorrected: false xrenderSmoothScale: true maxFpsInterval: 17 refreshRate: 0 vBlankTime: 6144 glDirect: true glStrictBinding: false glStrictBindingFollowsDriver: true glLegacy: false Screens ======= Multi-Head: no Number of Screens: 1 Screen 0 Geometry: 0,0,1920x1080 Compositing =========== Qt Graphics System: raster Compositing is active Compositing Type: OpenGL OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop OpenGL version string: 3.0 Mesa 9.1.1 Driver: Intel GPU class: SandyBridge OpenGL version: 3.0 Mesa version: 9.1.1 X server version: 1.13.1 Linux kernel version: 3.8.3 Direct rendering: yes Requires strict binding: no GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no OpenGL 2 Shaders are used Loaded Effects: --------------- kwin4_effect_zoom kwin4_effect_login kwin4_effect_slidingpopups kwin4_effect_wobblywindows kwin4_effect_coverswitch kwin4_effect_minimizeanimation kwin4_effect_translucency kwin4_effect_screenshot kwin4_effect_slide kwin4_effect_desktopgrid kwin4_effect_flipswitch kwin4_effect_maximize kwin4_effect_fade kwin4_effect_dialogparent kwin4_effect_highlightwindow kwin4_effect_taskbarthumbnail kwin4_effect_presentwindows kwin4_effect_blur kwin4_effect_logout kwin4_effect_dashboard kwin4_effect_outline kwin4_effect_startupfeedback Currently Active Effects: ------------------------- kwin4_effect_blur Effect Settings: ---------------- kwin4_effect_zoom: zoomFactor: 1.2 mousePointer: 0 mouseTracking: 0 enableFocusTracking: false followFocus: true focusDelay: 350 moveFactor: 20 targetZoom: 1 kwin4_effect_login: fadeToBlack: false kwin4_effect_slidingpopups: fadeInTime: 250 fadeOutTime: 250 kwin4_effect_wobblywindows: stiffness: 0.03 drag: 0.92 moveFactor: 0.2 xTesselation: 20 yTesselation: 20 minVelocity: 0 maxVelocity: 1000 stopVelocity: 0.5 minAcceleration: 0 maxAcceleration: 1000 stopAcceleration: 0.5 moveEffectEnabled: true openEffectEnabled: false closeEffectEnabled: false moveWobble: true resizeWobble: true kwin4_effect_coverswitch: animationDuration: 200 animateSwitch: true animateStart: true animateStop: true reflection: true windowTitle: true zPosition: 900 dynamicThumbnails: true thumbnailWindows: 8 primaryTabBox: false secondaryTabBox: false kwin4_effect_minimizeanimation: kwin4_effect_translucency: decoration: 1 moveResize: 0.8 dialogs: 1 inactive: 1 comboboxPopups: 1 menus: 1 individualMenuConfig: false dropDownMenus: 1 popupMenus: 1 tornOffMenus: 1 kwin4_effect_screenshot: kwin4_effect_slide: kwin4_effect_desktopgrid: zoomDuration: 300 border: 10 desktopNameAlignment: 0 layoutMode: 0 customLayoutRows: 2 usePresentWindows: true kwin4_effect_flipswitch: tabBox: false tabBoxAlternative: false duration: 200 angle: 30 xPosition: 0.330000013113022 yPosition: 1 windowTitle: true kwin4_effect_maximize: kwin4_effect_fade: kwin4_effect_dialogparent: changeTime: 300 kwin4_effect_highlightwindow: kwin4_effect_taskbarthumbnail: kwin4_effect_presentwindows: layoutMode: 0 showCaptions: true showIcons: true doNotCloseWindows: false ignoreMinimized: false accuracy: 20 fillGaps: true fadeDuration: 150 showPanel: false leftButtonWindow: 1 rightButtonWindow: 2 middleButtonWindow: 0 leftButtonDesktop: 2 middleButtonDesktop: 0 rightButtonDesktop: 0 dragToClose: false kwin4_effect_blur: blurRadius: 12 cacheTexture: true kwin4_effect_logout: useBlur: true kwin4_effect_dashboard: brightness: 0.5 saturation: 0.5 blur: false kwin4_effect_outline: kwin4_effect_startupfeedback:
I had to ask :-) There is a performance regression in Mesa 9.1 which we worked around in 4.10.1. Looking at the data it makes sense. So far we only knew about performance regressions with IvyBridge but not with SandyBridge (tested on my own system, running Mesa 9.2), that's why the workaround only goes for IvyBridge. Anyway to get rid of the problem change "Scale method" from "Accurate" to "Smooth". Setting to duplicate of the IvyBridge report. *** This bug has been marked as a duplicate of bug 313613 ***
OK, thx. I applied this patch diff --git a/kwin/lanczosfilter.cpp b/kwin/lanczosfilter.cpp index b0f85e2..c4b8b14 100644 --- a/kwin/lanczosfilter.cpp +++ b/kwin/lanczosfilter.cpp @@ -68,7 +68,7 @@ void LanczosFilter::init() if (!force && gl->driver() == Driver_Intel && gl->chipClass() < SandyBridge) return; // Broken on IvyBridge with Mesa 9.1 - BUG 313613 - if (!force && gl->driver() == Driver_Intel && gl->chipClass() == IvyBridge && gl->mesaVersion() >= kVersionNumber(9, 1)) + if (!force && gl->driver() == Driver_Intel && (gl->chipClass() == IvyBridge || gl->chipClass() == SandyBridge) && gl->mesaVersion() >= kVersionNumber(9, 1)) return; // With fglrx the ARB Shader crashes KWin (see Bug #270818 and #286795) if (!force && gl->driver() == Driver_Catalyst && effects->compositingType() == OpenGL1Compositing) { And everything is fine :) ">= SandyBridge" would have worked, too, but probably haswell (that's the next gen, AFAIR) is not affected.