Due to platform issues, the radeon driver crashes my system daily. As a workaround, so I can get work done, I am stuck using the fbdev Xorg driver. Everything works great, even 3D games like Jedi Academy are playable (using llvmpipe 3D rendering on ~13 cores), yet for some reason whenever I open a window, KWin eats 100% of a single CPU core for a full 3-4 seconds before drawing the decoration (or allowing any further usage of the GUI). With multiple windows, I have to wait 3-4 seconds *per window* before the system responds again - using Xpra to attach to dozens of windows, I have to just go do something else while I wait. Compositing is of course disabled. perf report shows: Samples: 473K of event 'cycles:ppp', Event count (approx.): 440153905977 Overhead Command Shared Object Symbol 2.99% kwin_x11 libLLVMAnalysis.so.5.0.1 [.] llvm::PointerMayBeCaptured 2.06% kwin_x11 libLLVMCodeGen.so.5.0.1 [.] _init 1.86% kwin_x11 libLLVMSelectionDAG.so.5.0.1 [.] _init 1.83% kwin_x11 libc-2.25.so [.] _int_malloc 1.65% kwin_x11 libc-2.25.so [.] _int_free 1.61% kwin_x11 libLLVMCore.so.5.0.1 [.] _init 1.55% kwin_x11 libc-2.25.so [.] malloc 1.35% kwin_x11 libLLVMAnalysis.so.5.0.1 [.] _init 1.31% kwin_x11 libLLVMSupport.so.5.0.1 [.] llvm::FoldingSetNodeID::AddInteger 1.31% kwin_x11 libc-2.25.so [.] __memcpy_power7 1.02% kwin_x11 libLLVMSupport.so.5.0.1 [.] llvm::SmallPtrSetImplBase::FindBucketFor 0.95% kwin_x11 libLLVMSupport.so.5.0.1 [.] _init 0.93% kwin_x11 swrastg_dri.so [.] convert_ubyte_rgba_to_bgra 0.72% kwin_x11 libLLVMCodeGen.so.5.0.1 [.] llvm::LiveIntervalUnion::Query::collectInterferingVRegs 0.60% kwin_x11 libLLVMCore.so.5.0.1 [.] llvm::Use::getUser 0.58% kwin_x11 libLLVMCore.so.5.0.1 [.] llvm::Use::getImpliedUser 0.58% kwin_x11 libLLVMSelectionDAG.so.5.0.1 [.] llvm::SelectionDAG::computeKnownBits 0.57% kwin_x11 libLLVMSupport.so.5.0.1 [.] llvm::SmallPtrSetImplBase::insert_imp_big 0.55% kwin_x11 libLLVMCore.so.5.0.1 [.] llvm::Type::getPrimitiveSizeInBits 0.54% kwin_x11 libLLVMAnalysis.so.5.0.1 [.] llvm::BasicAAResult::DecomposeGEPExpression
Please provide the output of qdbus org.kde.KWin /KWin supportInformation
Version ======= KWin version: 5.11.5 Qt Version: 5.9.4 Qt compile version: 5.9.4 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.kwin.aurorae Theme: kwin4_decoration_qml_plastik Blur: 1 onAllDesktopsAvailable: true alphaChannelSupported: false closeOnDoubleClickOnMenu: false decorationButtonsLeft: 5, 4, 7, 3, 2, 9, 6 decorationButtonsRight: 0 borderSize: 3 gridUnit: 10 font: Droid Sans,10,-1,0,50,0,0,0,0,0,Regular smallSpacing: 2 largeSpacing: 10 Options ======= focusPolicy: 0 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: true shadeHoverInterval: 250 separateScreenFocus: false placement: 4 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false rollOverDesktops: true focusStealingPreventionLevel: 0 legacyFullscreenSupport: false operationTitlebarDblClick: 5009 operationMaxButtonLeftClick: 5000 operationMaxButtonMiddleClick: 5015 operationMaxButtonRightClick: 5014 commandActiveTitlebar1: 0 commandActiveTitlebar2: 30 commandActiveTitlebar3: 2 commandInactiveTitlebar1: 4 commandInactiveTitlebar2: 30 commandInactiveTitlebar3: 2 commandWindow1: 7 commandWindow2: 8 commandWindow3: 6 commandWindowWheel: 31 commandAll1: 10 commandAll2: 3 commandAll3: 14 keyCmdAllModKey: 16777251 showGeometryTip: true condensedTitle: false electricBorderMaximize: false electricBorderTiling: false 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: 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: default Geometry: 0,0,1920x1080 Refresh Rate: 0 Compositing =========== Compositing is not active
Please try switching to the breeze window decoration. It might significantly improve the experience
Breeze does indeed eliminate the delay. However, I much prefer Plastik. Is that part of KWin, or where should the bug get reassigned?
Please update to 5.12. It has improved support for this situation.