Since switching distro to fedora, I encountered a rather weird issue, the taskbar seems to randomly freeze for a few seconds when switching windows by clicking on their respective icons, does not seem to happen when alt-tabbing. I've managed to observe several of these entries when the taskbar becomes unresponsive: kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling It's becoming a rather annoying situation, because when this occurs the taskbar thinks I'm dragging application icons around, aside obviously from the 1-2 second lag when switching windows. Below the full log: <pre> ➜ ~ kwin_x11 --replace Warning: Setting a new default format with a different version or profile after the global shared context is created may cause issues with context sharing. kwin_platform_x11_standalone: Has XInput support 2 . 2 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 180, resource id: 16777235, major code: 20 (GetProperty), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 181, resource id: 16777235, major code: 20 (GetProperty), minor code: 0 kwin_core: Extensions: shape: 0x "11" composite: 0x "4" render: 0x "b" fixes: 0x "50" randr: 0x "14" sync: 0x "31" damage: 0x "11" kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5089:46: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5091:48: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5093:48: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5097:47: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5099:46: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5107:48: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5111:46: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5113:46: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5117:45: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5120:46: this compose sequence is a duplicate of another; skipping line kwin_xkbcommon: XKB: created compose table from locale en_US.UTF-8 with path /usr/share/X11/locale/en_US.UTF-8/Compose kwin_xkbcommon: XKB: Compiling from RMLVO: rules 'evdev', model 'asus_laptop', layout 'us', variant '(null)', options '(null)' kwin_xkbcommon: XKB: Compiling from KcCGST: keycodes 'evdev+aliases(qwerty)', types 'complete', compat 'complete', symbols 'pc+us+inet(evdev)' kwin_xkbcommon: XKB: Compiling xkb_keycodes "(unnamed)" kwin_xkbcommon: XKB: Compiling xkb_types "(unnamed)" kwin_xkbcommon: XKB: Compiling xkb_compatibility "(unnamed)" kwin_xkbcommon: XKB: The "group" statement in compat is unsupported; Ignored kwin_xkbcommon: XKB: The "group" statement in compat is unsupported; Ignored kwin_xkbcommon: XKB: The "group" statement in compat is unsupported; Ignored kwin_xkbcommon: XKB: The "allowExplicit" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: The "allowExplicit" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: The "allowExplicit" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: The "allowExplicit" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: The "indicatorDrivesKeyboard" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: The "allowExplicit" field in indicator statements is unsupported; Ignored kwin_xkbcommon: XKB: Indicator name "Shift Lock" was not declared in the keycodes section; Adding new indicator kwin_xkbcommon: XKB: Indicator name "Group 2" was not declared in the keycodes section; Adding new indicator kwin_xkbcommon: XKB: Indicator name "Mouse Keys" was not declared in the keycodes section; Adding new indicator kwin_xkbcommon: XKB: Compiling xkb_symbols "(unnamed)" kwin_decorations: Trying to load decoration plugin: "/usr/lib64/qt5/plugins/org.kde.kdecoration2/breezedecoration.so" kwin_core: User timestamp, ASN: 27432172 kwin_core: User timestamp, final: KWin::X11Client(0x562e4459c770, windowId=0x1800019, caption="Desktop — Plasma <@fedora>\u200E") : 27432172 kwin_core: User timestamp, ASN: 27851900 kwin_core: User timestamp, final: KWin::X11Client(0x562e4456bd70, windowId=0x6000005, caption="Atos SSO") : 27851900 kwin_core: User timestamp, ASN: 27972786 kwin_core: User timestamp, final: KWin::X11Client(0x562e445a0370, windowId=0x520002c, caption="KWin/Debugging - KDE Community Wiki — Mozilla Firefox") : 27972786 kwin_core: User timestamp, ASN: 27902960 kwin_core: User timestamp, final: KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E") : 27902960 kwin_core: User timestamp, ASN: 27979388 kwin_core: User timestamp, final: KWin::X11Client(0x562e446699a0, windowId=0x2e00007, caption="~ : zsh — Yakuake <@fedora>\u200E") : 27979388 qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 1649, resource id: 16777251, major code: 3 (GetWindowAttributes), minor code: 0 qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 1650, resource id: 16777251, major code: 14 (GetGeometry), minor code: 0 kwin_core: Attempting to load the OpenGL scene kwin_platform_x11_standalone: Choosing GLXFBConfig 0x20d X visual 0x56c depth 24 RGBA 8:8:8:0 ZS 0:0 sRGB: 1 kwin_platform_x11_standalone: Global share context format: QSurfaceFormat(version 4.6, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions|ResetNotification), depthBufferSize 0, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 0, stencilBufferSize 0, samples -1, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CompatibilityProfile) kwin_platform_x11_standalone: Created GLX context with attributes: Version requested: true Version: 3.1 Robust: true Reset on video memory purge: false Forward compatible: false Core profile: false Compatibility profile: false High priority: false OpenGL vendor string: AMD OpenGL renderer string: AMD RENOIR (DRM 3.44.0, 5.17.13-200.fc35.x86_64, LLVM 13.0.0) OpenGL version string: 4.6 (Compatibility Profile) Mesa 21.3.8 OpenGL shading language version string: 4.60 Driver: RadeonSI GPU class: Vega OpenGL version: 4.6 GLSL version: 4.60 Mesa version: 21.3.8 X server version: 1.20.14 Linux kernel version: 5.17.13 Requires strict binding: yes GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no kwin_platform_x11_standalone: Direct rendering: true kwin_core: OpenGL compositing has been successfully initialized kwin_core: Successfully loaded plugin effect: "startupfeedback" kwin_core: Successfully loaded plugin effect: "screenshot" kwin_core: Successfully loaded plugin effect: "contrast" kwin_core: Successfully loaded plugin effect: "blur" kwin_core: Successfully loaded plugin effect: "zoom" kwin_core: Successfully loaded plugin effect: "slidingpopups" kwin_core: Successfully loaded plugin effect: "slide" kwin_core: Successfully loaded plugin effect: "screenedge" kwin_core: Successfully loaded plugin effect: "presentwindows" kwin_core: Effect is not supported: "screentransform" kwin_core: Successfully loaded plugin effect: "kscreen" kwin_core: Successfully loaded plugin effect: "highlightwindow" kwin_core: Successfully loaded plugin effect: "desktopgrid" kwin_core: Successfully loaded plugin effect: "colorpicker" kwin_platform_x11_standalone: Using FBConfig 0x49f for visual 0x695 kwin_platform_x11_standalone: Using FBConfig 0x193 for visual 0x4f2 kwin_platform_x11_standalone: Using FBConfig 0x49f for visual 0x695 kwin_core: XCB error: 10 (BadAccess), sequence: 1799, resource id: 1709, major code: 142 (Composite), minor code: 2 (RedirectSubwindows) kwin_core: Successfully loaded scripted effect: "kwin4_effect_scale" kwin_core: Successfully loaded scripted effect: "kwin4_effect_morphingpopups" kwin_core: Successfully loaded scripted effect: "kwin4_effect_fadingpopups" kwin_core: Successfully loaded scripted effect: "kwin4_effect_dialogparent" kwin_core: Successfully loaded scripted effect: "kwin4_effect_sessionquit" kwin_core: Successfully loaded scripted effect: "kwin4_effect_squash" kwin_core: Successfully loaded scripted effect: "kwin4_effect_login" kwin_core: Successfully loaded scripted effect: "kwin4_effect_fullscreen" kwin_core: Successfully loaded scripted effect: "kwin4_effect_frozenapp" kwin_core: Successfully loaded scripted effect: "kwin4_effect_maximize" kwin_core: Successfully loaded scripted effect: "kwin4_effect_windowaperture" kwin_core: Successfully loaded scripted effect: "kwin4_effect_logout" kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: getaddrinfo failed with error: Name or service not known kwin_core: getaddrinfo failed with error: Name or service not known kwin_core: getaddrinfo failed with error: Name or service not known kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: User timestamp, ASN: 28004008 kwin_core: User timestamp, final: KWin::X11Client(0x562e450c4640, windowId=0x1800051, caption="Plasma <@fedora>\u200E", transientFor=KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E")) : 28004008 kwin_core: Activation: No client active, allowing kwin_core: User timestamp, ASN: 28007760 kwin_core: User timestamp, final: KWin::X11Client(0x562e450c60c0, windowId=0x1800051, caption="Plasma <@fedora>\u200E", transientFor=KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E")) : 28007760 kwin_core: Activation: No client active, allowing kwin_core: User timestamp, ASN: 28011510 kwin_core: User timestamp, final: KWin::X11Client(0x562e450c74c0, windowId=0x1800051, caption="Plasma <@fedora>\u200E", transientFor=KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E")) : 28011510 kwin_core: Activation: No client active, allowing kwin_core: User timestamp, ASN: 28022759 kwin_core: User timestamp, final: KWin::X11Client(0x562e44db76c0, windowId=0x1800051, caption="Plasma <@fedora>\u200E", transientFor=KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E")) : 28022759 kwin_core: Activation, compared: KWin::X11Client(0x562e44db76c0, windowId=0x1800051, caption="Plasma <@fedora>\u200E", transientFor=KWin::X11Client(0x562e446668d0, windowId=0x1800039, caption="Plasma <@fedora>\u200E")) : 28022759 : 28022142 : true kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling kwin_core: void KWin::Item::stackBefore(KWin::Item*) requires a valid sibling
Thanks for the bug report. I'm sorry we weren't able to get to this yet. There have been many fixes and improvements since this was reported, and this issue may have been fixed. Can you please re-test on your system with Plasma 6.5.5 or later and let us know if you can still reproduce the problem? If you can, please set this report back to REPORTED. If you can reproduce it, can you let us know if it happens only with X11, only with Wayland or both? Thanks!
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME. For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging. Thank you for helping us make KDE software even better for everyone!