SUMMARY On Wayland with the latest beta, KWin randomly freezes when opening the tabbox. STEPS TO REPRODUCE 1. Move the mouse cursor continuously (e.g. in a circle) 2. At the same time, press Alt+Tab (hold down the Alt key for a short moment before releasing to ensure the tab box displays) OBSERVED RESULT The screen freezes for a moment before the Tab Box shows up. EXPECTED RESULT The screen should not freeze at all. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.91.0 KDE Frameworks Version: 5.247.0 Qt Version: 6.7.0 Kernel Version: 6.6.8-arch1-1 (64-bit) Graphics Platform: Wayland
What hardware is this on?
This is on an AMD Remberant (integrated Radeon 680M) laptop. OpenGL core profile vendor: AMD OpenGL core profile renderer: AMD Radeon Graphics (radeonsi, rembrandt, LLVM 16.0.6, DRM 3.54, 6.6.8-arch1-1) OpenGL core profile version: 4.6 (Core Profile) Mesa 23.3.2-arch1.1 OpenGL core profile shading language version: 4.60
The same kind of freeze can also be observed when opening the overview.
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I can reproduce this only with the new default Thumbnail Grid switcher. Large Icons, Sidebar, and others do not exhibit the issue. GPU hardware is an Intel HD620 10th gen iGPU. The issue in Overview is likely something different.
I can also reproduce this using Thumbnail Grid, on "Intel Raptor Lake-P [Iris Xe Graphics]"
*** Bug 482557 has been marked as a duplicate of this bug. ***
*** Bug 484134 has been marked as a duplicate of this bug. ***
I have the same issue, for me the delay can be as high as 5 seconds sometimes. It might or might not be related, but when "Hide other windows when hovering over previews" is enabled on the tray, hovering over a thumbnail exhibits the same behavior.
I wasn't able to pinpoint the exact moment yet but it seems to get worse with repeatedly plugging & unplugging monitors. E.g. in the period of 1-2 days I repeatedly use my laptop with and without an external monitor and it gets worse.
I can repro this on Fedora 40 beta, but not in the kdesrc-built session of Plasma. Also another difference is that this happens on laptop has integrated intel gpu, while the device I can't repro it on is desktop PC with AMD GPU. System where I can repro it: Operating System: Fedora Linux 40 KDE Plasma Version: 6.0.3 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 Kernel Version: 6.8.4-300.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz Memory: 7.5 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics 620 Manufacturer: LENOVO Product Name: 20KF001RMX System Version: ThinkPad X280
This bug is plaguing me as well on my amd desktop (both cpu and gpu). Since I have a spare computer, I used gdb when this happened, here's the slow backtrace: #0 0x000070d995a46b4d in clock_gettime () #1 0x000070d9922f2e2d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/sysv/linux/clock_gettime.c:42 #2 0x000070d9924d2dd8 in std::chrono::_V2::steady_clock::now () at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/chrono.cc:87 #3 0x000070d99294b456 in QElapsedTimer::durationElapsed (this=0x70d99574bc10 <KWin::AnimationEffect::s_clock>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qelapsedtimer.cpp:278 #4 QElapsedTimer::elapsed (this=this@entry=0x70d99574bc10 <KWin::AnimationEffect::s_clock>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qelapsedtimer.cpp:312 #5 0x000070d9951c1698 in KWin::AnimationEffect::clock () at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/animationeffect.h:347 #6 KWin::AnimationEffect::updateLayerRepaints (this=this@entry=0x55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/animationeffect.cpp:858 #7 0x000070d9951c22eb in KWin::AnimationEffect::triggerRepaint (this=0x55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/animationeffect.cpp:815 #8 0x000070d9951c5bfb in KWin::AnimationEffect::p_animate (this=this@entry=0x55ad5de0d9c0, w=w@entry=0x55ad5e889a00, a=a@entry=KWin::AnimationEffect::Opacity, meta=<optimized out>, meta@entry=0, ms=150, to=..., curve=..., delay=0, from=..., keepAtTarget=true, fullScreenEffect=false, keepAlive=false, shader=0x0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/animationeffect.cp p:283 #9 0x000055ad31836079 in KWin::AnimationEffect::set (to=<optimized out>, from=<optimized out>, a=KWin::AnimationEffect::Opacity, meta=0, delay=0, fullScreen=false, keepAlive=false, shader=0x0, curve=..., ms=<optimized out>, w=0x55ad5e889a00, this=0x 55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/animationeffect.h:411 #10 KWin::HighlightWindowEffect::startGhostAnimation (this=this@entry=0x55ad5de0d9c0, window=<optimized out>, window@entry=0x55ad5e889a00) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindo w/highlightwindow.cpp:219 #11 0x000055ad31836265 in KWin::HighlightWindowEffect::prepareHighlighting (this=this@entry=0x55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindow/highlightwindow.cpp:170 #12 0x000055ad31839c3a in KWin::HighlightWindowEffect::highlightWindows (this=this@entry=0x55ad5de0d9c0, windows=...) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindow/highlightwindow.cpp :209 #13 0x000055ad31839f13 in KWin::HighlightWindowEffect::highlightWindows (windows=..., this=0x55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindow/highlightwindow.cpp:198 #14 KWin::HighlightWindowEffect::perform (feature=<optimized out>, arguments=<optimized out>, this=0x55ad5de0d9c0) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindow/highlightwindow.cpp:27 3 #15 KWin::HighlightWindowEffect::perform (this=0x55ad5de0d9c0, feature=<optimized out>, arguments=<optimized out>) at /usr/src/debug/kwin/kwin-6.0.4.1/src/plugins/highlightwindow/highlightwindow.cpp:26 5 #16 0x000070d9951d758e in KWin::EffectsHandler::highlightWindows (this=<optimized out>, windows=<optimized out>) at /usr/src/debug/kwin/kwin-6.0.4.1/src/effect/effecthandler.cpp:1418 #17 0x000070d9954ef4fc in KWin::TabBox::TabBoxHandlerImpl::highlightWindows (this=<optimized out>, window=<optimized out>, controller=0x55ad5e695a10) at /usr/src/debug/kwin/kwin-6.0.4.1/src/tabbox/tabb ox.cpp:274 #18 0x000070d9929a1e3e in QtPrivate::QSlotObjectBase::call (this=<optimized out>, r=0x55ad5d1fa280, a=0x7ffe2bac8d98, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:469 #19 doActivate<false> (sender=<optimized out>, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4078 #20 0x000070d9928d34d4 in QSingleShotTimer::timeout (this=0x55ad5de29e10) at /usr/src/debug/qt6-base/build/src/corelib/Core_autogen/7GB2EGQPHR/moc_qsingleshottimer_p.cpp:139 #21 QSingleShotTimer::timerEvent (this=0x55ad5de29e10) at /usr/src/debug/qt6-base/build/src/corelib/Core_autogen/7GB2EGQPHR/../../../../../qtbase/src/corelib/kernel/qsingleshottimer_p.h:116 #22 0x000070d99298c809 in QObject::event (this=0x55ad5de29e10, e=0x7ffe2bac8f70) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:1423 #23 0x000070d993afc4dc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55ad5de29e10, e=0x7ffe2bac8f70) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3287 #24 0x000070d992945678 in QCoreApplication::notifyInternal2 (receiver=0x55ad5de29e10, event=0x7ffe2bac8f70) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142 #25 0x000070d992ac4998 in QCoreApplication::sendEvent (receiver=<optimized out>, event=0x7ffe2bac8f70) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1583 #26 QTimerInfoList::activateTimers (this=this@entry=0x55ad5cde4068) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:436 #27 0x000070d992ac70c8 in QEventDispatcherUNIXPrivate::activateTimers (this=0x55ad5cde3f90) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:196 #28 QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=..., flags@entry=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:472 #29 0x000070d9935f8353 in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qunixeventdispatcher.cpp:27 #30 0x000070d99294f94e in QEventLoop::processEvents (this=0x7ffe2bac9160, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:100 #31 QEventLoop::exec (this=0x7ffe2bac9160, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:182 #32 0x000070d992949c9d in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qflags.h:74 #33 0x000070d993af837a in QApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2555 #34 0x000055ad317e6dee in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kwin/kwin-6.0.4.1/src/main_wayland.cpp:609 From the backtrace I could read that it has something with previewing windows. When I disabled previews in the window switcher in settings, the alt+tab was swift again, however, this bug is not limited to that. The lag also occurs when I hover over certain windows in the taskbar (you have to actually hover the thumbnail, simply hovering the task bar is not enough). In my case the culprit is brave that runs on wayland, as well as jetbrains products that use xwayland.
I'm using Jetbrains products as well so that might be related.
I can confirm, that for some reason, sometimes, jetbrains products trigger this and the problem remains after they are closed and the delay accumulates over time. I've seen no problem with their flagship intellij ultimate, but opening clion triggered the lags when previewing windows and remained even after closing it.
*** Bug 489355 has been marked as a duplicate of this bug. ***
I'm getting the same/similar behavior on my machine. I'm also using PHPStorm, but I have not checked if not using PHPStorm prevents this behavior. Observations: When the machine is freshly booted everything is fine. After a few hours and a lot of "alt tabbing", "alt tabbing" gets slower and slower. When "alt tabbing" quickly though, meaning not waiting for the task switcher to open, it still works perfectly. Only when I want the task switcher to show up, meaning holding alt after "alt tabbing", my desktop freezes for a second. My machine: Fedora 40 KDE 6.2.2 CPU: AMD Ryzen 7 7735HS GPU: AMD Radeon 680M Wayland Kernel Version: 6.11.4-201.fc40.x86_64 (64-bit)
*** Bug 494682 has been marked as a duplicate of this bug. ***
(In reply to Flo from comment #16) > I'm getting the same/similar behavior on my machine. > I'm also using PHPStorm, but I have not checked if not using PHPStorm > prevents this behavior. > > Observations: > When the machine is freshly booted everything is fine. > After a few hours and a lot of "alt tabbing", "alt tabbing" gets slower and > slower. When "alt tabbing" quickly though, meaning not waiting for the task > switcher to open, it still works perfectly. > Only when I want the task switcher to show up, meaning holding alt after > "alt tabbing", my desktop freezes for a second. I'm having this exact same syndrome!
(In reply to Flo from comment #16) > I'm getting the same/similar behavior on my machine. You can try working around it by switching your Task Switcher to Cover Switch and Flip Switch. I don't have this issue with these 2. I'm not using PHPStorm by the way. Providing sys info here: Operating System: Arch Linux KDE Plasma Version: 6.2.2 KDE Frameworks Version: 6.7.0 Qt Version: 6.8.0 Kernel Version: 6.11.5-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 5500U with Radeon Graphics Memory: 37.1 GiB of RAM Graphics Processor: AMD Radeon Graphics
*** Bug 494763 has been marked as a duplicate of this bug. ***
> You can try working around it by switching your Task Switcher to Cover > Switch and Flip Switch. I don't have this issue with these 2. > I'm not using PHPStorm by the way. This and the backtrace might indicate some issue with the Highlight effect (the one that hides all the windows but the selected one). Flip and Cover switches make use of thumbnails but disable this effect, as the desktop is already fully covered Another workaround/datapoint can be to de-select the "Show selected window" to disable this effect and check whether the issue persists.
I think I'm affected by this, my screen noticeably freezes when alt tabbing. Same happens when I hover over the preview of the window in the task manager. This disappears entirely for the task switcher when I disable "Show selected window". For what it's worth, I do have Jetbrains products but don't have one running at the moment besides toolbox. Sysinfo: Operating System: Arch Linux KDE Plasma Version: 6.2.4 KDE Frameworks Version: 6.8.0 Qt Version: 6.8.0 Kernel Version: 6.12.1-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor Memory: 31,3 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 3080/PCIe/SSE2 Product Name: X570 Phantom Gaming 4
I can also confirm that unchecking "Show selected window" decreases the lag. I first switched to "Thumbnail" switcher, checked "Show selected window". After some hours the lag is noticeable. Then uncheck "Show selected window", the lag is gone. Wayland.
Bad news, I can confirm there's lag even if "Show selected window" is unchecked. I can also confirm that the lag is a bit longer if "Show selected window" is checked.
It's strange that there's no lag in this desktop session I'm currently in ("Show selected window" unchecked), uptime is 3 days. I will test more and report if there's anything new.
Well it seems there's lag when "Show selected window" is checked after I play Stalker: Anomaly with Proton, and the lag disappears after short minutes. Probably either Proton or the game engine or some other stuff messed with something, not related to the issue we are talking about.
I can also reproduce the issue by opening the color picker in Gimp
Is anyone able to reproduce this in Plasma 6.3 2 or later? I can't anymore, or else it's gotten so subtle that I struggle to notice it.
(In reply to Nate Graham from comment #28) > Is anyone able to reproduce this in Plasma 6.3 2 or later? I can't anymore, > or else it's gotten so subtle that I struggle to notice it. Not tried 6.3.2 yet, but am on 6.3.1 and it's still very present. Alt+Tab takes a few solid seconds to show - using Wayland + JetBrains products, like others.
The issue still persists with kwin 6.3.2. The issue happens because kwin is almost single threaded, see https://invent.kde.org/plasma/kwin/-/issues/174. Only atomic commit operations have a dedicated thread, but this is no enough to prevent missing frames because some components of Kwin such as animation effects take more than 1 frame time to load and happen in the same thread as the render, then we are observing screen stutters. A solution would be to decouple the render, inputs and animations in dedicated threads.
I tried this on kwin 6.3.2, and at least on my hardware it doesn't seem to be problem anymore - enabled previews on both alt+tab and on panel. However, I still perceive a noticeable lag when I run a specific app - jetbrains-toolbox, the lag is a few seconds on startup and then its gone but its very annoying. At first I thought it was the same bug, since they started happening roughly at the same time, but perhaps they are different. I gathered two backtraces, both tried to lock some file (~/.cache/ksycoca6_sk_nop9DZq8nJaIQSYW9C_NnZLWhVc=): > #0 0x0000792cd86abbe2 in ??? () at /usr/lib/libc.so.6 > #1 0x0000792cd869fe33 in ??? () at /usr/lib/libc.so.6 > #2 0x0000792cd86f0a82 in clock_nanosleep () at /usr/lib/libc.so.6 > #3 0x0000792cd86fcc27 in nanosleep () at /usr/lib/libc.so.6 > #4 0x0000792cd8127dbb in QLockFile::tryLock(std::chrono::duration<long, std::ratio<1l, 1000l> >) () at /usr/lib/libQt6Core.so.6 > #5 0x0000792cd9bd0871 in KBuildSycoca::recreate(bool) () at /usr/lib/libKF6Service.so.6 > #6 0x0000792cd9bb6f42 in KSycocaPrivate::buildSycoca() () at /usr/lib/libKF6Service.so.6 > #7 0x0000792cd9bb7133 in KSycocaPrivate::checkDatabase(QFlags<KSycocaPrivate::BehaviorIfNotFound>) () at /usr/lib/libKF6Service.so.6 > #8 0x0000792cd9bb94ca in KSycoca::ensureCacheValid() () at /usr/lib/libKF6Service.so.6 > #9 0x0000792cd9bb01a1 in KService::serviceByStorageId(QString const&) () at /usr/lib/libKF6Service.so.6 > #10 0x0000792cda9a12e0 in ??? () at /usr/lib/libKGlobalAccelD.so.0 > #11 0x0000792cda9954a9 in GlobalShortcutsRegistry::refreshServices() () at /usr/lib/libKGlobalAccelD.so.0 > #12 0x0000792cd81b1a49 in ??? () at /usr/lib/libQt6Core.so.6 > #13 0x0000792cd81baa75 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt6Core.so.6 > #14 0x0000792cd81a2ef9 in QObject::event(QEvent*) () at /usr/lib/libQt6Core.so.6 > #15 0x0000792cd94ff0ca in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6 > #16 0x0000792cd8155b00 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6 > #17 0x0000792cd82d5aff in QTimerInfoList::activateTimers() () at /usr/lib/libQt6Core.so.6 > #18 0x0000792cd82de408 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6 > #19 0x0000792cd8e61d93 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Gui.so.6 > #20 0x0000792cd81606a6 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6 > #21 0x0000792cd81591d6 in QCoreApplication::exec() () at /usr/lib/libQt6Core.so.6 > #22 0x000055bf2ca2607b in ??? () > #23 0x0000792cd8635488 in ??? () at /usr/lib/libc.so.6 > #24 0x0000792cd863554c in __libc_start_main () at /usr/lib/libc.so.6 > #25 0x000055bf2ca2c3f5 in ??? () and > #0 __syscall_cancel_arch () at ../sysdeps/unix/sysv/linux/x86_64/syscall_cancel.S:56 > #1 0x0000792cd869fe33 in __internal_syscall_cancel > (a1=a1@entry=0, a2=a2@entry=0, a3=<optimized out>, a4=<optimized out>, a5=a5@entry=0, a6=a6@entry=0, nr=230) at cancellation.c:49 > #2 0x0000792cd86f0a82 in __GI___clock_nanosleep (clock_id=<optimized out>, > clock_id@entry=0, flags=flags@entry=0, req=<optimized out>, rem=<optimized out>) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:48 > #3 0x0000792cd86fcc27 in __GI___nanosleep (req=<optimized out>, rem=<optimized out>) at ../sysdeps/unix/sysv/linux/nanosleep.c:25 > #4 0x0000792cd8127dbb in qt_nanosleep (amount=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:573 > #5 QThread::sleep (nsec=std::chrono::duration = { <optimized out>ns }) > at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:593 > #6 QLockFile::tryLock (this=<optimized out>, timeout=std::chrono::duration = { <optimized out>ms }, > timeout@entry=std::chrono::duration = { 9223372036854775807ms }) at /usr/src/debug/qt6-base/qtbase/src/corelib/io/qlockfile.cpp:320 > #7 0x0000792cd81280b3 in QLockFile::lock (this=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/io/qlockfile.cpp:233 > #8 0x0000792cd9bd0871 in KBuildSycoca::recreate (this=0x7ffced67e690, incremental=true) > at /usr/src/debug/kservice/kservice-6.11.0/src/sycoca/kbuildsycoca.cpp:353 > #9 0x0000792cd9bb6f42 in KSycocaPrivate::buildSycoca (this=this@entry=0x55bf3b7f25c0) > at /usr/src/debug/kservice/kservice-6.11.0/src/sycoca/ksycoca.cpp:668 > #10 0x0000792cd9bb704e in KSycocaPrivate::checkDirectories (this=this@entry=0x55bf3b7f25c0) > at /usr/src/debug/kservice/kservice-6.11.0/src/sycoca/ksycoca.cpp:639 > #11 0x0000792cd9bb7133 in KSycocaPrivate::checkDatabase (this=0x55bf3b7f25c0, ifNotFound=ifNotFound@entry=...) > at /usr/src/debug/kservice/kservice-6.11.0/src/sycoca/ksycoca.cpp:469 > #12 0x0000792cd9bb94ca in KSycoca::ensureCacheValid (this=0x55bf3b78c620) at /usr/include/qt6/QtCore/qflags.h:74 > #13 0x0000792cd9bb01a1 in KService::serviceByStorageId (_storageId=...) > at /usr/src/debug/kservice/kservice-6.11.0/src/services/kservice.cpp:435 > #14 0x0000792cda9a12e0 in GlobalShortcutsRegistry::refreshServices()::{lambda(std::unique_ptr<Component, void (*)(Component*)> const&)#1}::operator()(std::unique_ptr<Component, void (*)(Component*)> const&) const [clone .isra.0] > (component=std::unique_ptr<Component> = {...}, __closure=<optimized out>) > at /usr/src/debug/kglobalacceld/kglobalacceld-6.3.2/src/globalshortcutsregistry.cpp:938 > #15 0x0000792cda9954a9 in __gnu_cxx::__ops::_Iter_pred<GlobalShortcutsRegistry::refreshServices()::<lambda(const GlobalShortcutsRegistry::ComponentPtr&)> >::operator()<__gnu_cxx::__normal_iterator<std::unique_ptr<Component, void (*)(Component*)>*, std::vector<std::unique_ptr<Component, void (*)(Component*)> > > > (this=<synthetic pointer>, __it=Python Exception <class 'gdb.error'>: value has been optimized out > ) at /usr/include/c++/14.2.1/bits/predefined_ops.h:318 > #16 std::__find_if<__gnu_cxx::__normal_iterator<std::unique_ptr<Component, void (*)(Component*)>*, std::vector<std::unique_ptr<Component, void (*)(Component*)> > >, __gnu_cxx::__ops::_Iter_pred<GlobalShortcutsRegistry::refreshServices()::<lambda(const GlobalShortcutsRegistry::ComponentPtr&)> > > (__first=std::unique_ptr<Component> = {...}, __last=std::unique_ptr<Component> = {...}, __pred=...) > at /usr/include/c++/14.2.1/bits/stl_algobase.h:2107 > #17 std::__find_if<__gnu_cxx::__normal_iterator<std::unique_ptr<Component, void (*)(Component*)>*, std::vector<std::unique_ptr<Component, void (*)(Component*)> > >, __gnu_cxx::__ops::_Iter_pred<GlobalShortcutsRegistry::refreshServices()::<lambda(const GlobalShortcutsRegistry::ComponentPtr&)> > > (__first=Python Exception <class 'gdb.error'>: value has been optimized out > , __last=Python Exception <class 'gdb.error'>: value has been optimized out > , __pred=...) at /usr/include/c++/14.2.1/bits/stl_algobase.h:2152 > #18 std::__remove_if<__gnu_cxx::__normal_iterator<std::unique_ptr<Component, void (*)(Component*)>*, std::vector<std::unique_ptr<Component, void (*)(Component*)> > >, __gnu_cxx::__ops::_Iter_pred<GlobalShortcutsRegistry::refreshServices()::<lambda(const GlobalShortcutsRegistry::ComponentPtr&)> > > (__first=Python Exception <class 'gdb.error'>: value has been optimized out > , __last=std::unique_ptr<Component> = {...}, __pred=...) > at /usr/include/c++/14.2.1/bits/stl_algobase.h:2174 > #19 std::remove_if<__gnu_cxx::__normal_iterator<std::unique_ptr<Component, void (*)(Component*)>*, std::vector<std::unique_ptr<Component, void (*)(Component*)> > >, GlobalShortcutsRegistry::refreshServices()::<lambda(const GlobalShortcutsRegistry::ComponentPtr&)> > (__first=Python Exception <class 'gdb.error'>: value has been optimized out > > , __last=Python Exception <class 'gdb.error'>: value has been optimized out > , __pred=...) at /usr/include/c++/14.2.1/bits/stl_algo.h:832 > #20 GlobalShortcutsRegistry::refreshServices > (this=0x792cda9aea40 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder>) > at /usr/src/debug/kglobalacceld/kglobalacceld-6.3.2/src/globalshortcutsregistry.cpp:931 > #21 0x0000792cd81b1a49 in QtPrivate::QSlotObjectBase::call > (this=0x55bf3b7f9860, r=0x792cda9aea40 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder>, a=0x7ffced67ea80, this=<optimized out>, r=<optimized out>, a=<optimized out>) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:486 > #22 doActivate<false> (sender=<optimized out>, signal_index=<optimized out>, argv=<optimized out>) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4115 > #23 0x0000792cd81baa75 in QTimer::timeout > (this=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>, _t1=...) > at /usr/src/debug/qt6-base/build/src/corelib/Core_autogen/include/moc_qtimer.cpp:223 > #24 QTimer::timerEvent > (e=<optimized out>, this=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qtimer.cpp:285 > #25 QTimer::timerEvent > (this=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>, e=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qtimer.cpp:279 > #26 0x0000792cd81a2ef9 in QObject::event > (this=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>, e=0x7ffced67ec30) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:1393 > #27 0x0000792cd94ff0ca in QApplicationPrivate::notify_helper > (this=<optimized out>, receiver=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>, e=0x7ffced67ec30) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3296 > #28 0x0000792cd8155b00 in QCoreApplication::notifyInternal2 > (receiver=0x792cda9aeac0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__self> >::instance()::holder+128>, event=0x7ffced67ec30) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1172 > #29 0x0000792cd82d5aff in QCoreApplication::sendEvent (receiver=<optimized out>, event=0x7ffced67ec30) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1612 > #30 QTimerInfoList::activateTimers (this=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:426 > #31 0x0000792cd82de408 in QEventDispatcherUNIXPrivate::activateTimers (this=0x55bf3b447300) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:199 > #32 QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=..., flags@entry=...) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:475 > #33 0x0000792cd8e61d93 in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) > at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qunixeventdispatcher.cpp:27 > #34 0x0000792cd81606a6 in QEventLoop::processEvents (this=0x7ffced67ee30, flags=...) > at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:103 > #35 QEventLoop::exec (this=0x7ffced67ee30, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:185 > #36 0x0000792cd81591d6 in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/global/qflags.h:74 > #37 0x0000792cd94faf9a in QApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2564 > #38 0x000055bf2ca2607b in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kwin/kwin-6.3.2.1/src/main_wayland.cpp:622
(In reply to Nate Graham from comment #28) > Is anyone able to reproduce this in Plasma 6.3 2 or later? I can't anymore, > or else it's gotten so subtle that I struggle to notice it. Its still happening for me. It might take a little longer to accumulate, but still very very noticeable after a few days without rebooting. Operating System: Fedora Linux 41 KDE Plasma Version: 6.3.2 KDE Frameworks Version: 6.11.0 Qt Version: 6.8.2 Kernel Version: 6.13.5-200.fc41.x86_64 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 7735HS with Radeon Graphics Memory: 30.1 GiB of RAM Graphics Processor: AMD Radeon 680M Manufacturer: LENOVO Product Name: 21M50022GE System Version: ThinkPad E16 Gen 2
plasma 6.3.3, freezes randomly on alt-tab in compact mode, no compositor, X11, Gentoo, 6.13.4, nvidia-drivers-570.124.04