SUMMARY Kwin freezes when closing the file picker after a long period of usage. Here is the following logs from Kwin: janv. 19 00:04:26 thesword-msi kwin_wayland[1191]: The main thread was hanging temporarily! janv. 19 00:04:30 thesword-msi kwin_wayland[1191]: The main thread was hanging temporarily! STEPS TO REPRODUCE 1. Launch a plasma session for several hours. 2. Open the file picker (with vscode for example). 3. Close the file picker. OBSERVED RESULT Kwin freeze for 1 second. EXPECTED RESULT Kwin don't freeze. SOFTWARE/OS VERSIONS Archlinux 6.18.5-arch1-1 KDE Plasma Version: 6.5.5 KDE Frameworks Version: 6.22.0 Qt Version: 6.10.1
Can you get a backtrace of kwin when it's frozen? (note you need to do this from a different machine via ssh) otherwise you will lock yourself out. Run gdb attach -p $(pidof kwin_wayland) in a terminal window while it's hung If it says "--Type for more, q to quit, c to continue without paging--" at the bottom of the terminal window, press the "c" key. When you see a prompt that says "(gdb)", type "bt" and press the enter key. If it says "--Type for more, q to quit, c to continue without paging--" at the bottom of the terminal window, press the "c" key. Copy-and-paste the contents of the terminal window into a comment here.
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Hello David, I found freezes are caused by the Klassy theme, so I will report the issue here: https://github.com/paulmcauley/klassy/issues. This bug can be closed. #0 0x00007f4a370cbf9c in std::_Rb_tree_insert_and_rebalance (__insert_left=<optimized out>, __x=0x55f4b4e7efd0, __p=<optimized out>, __header=...) at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++98/tree.cc:271 #1 0x00007f4a38d831b7 in ??? () at /usr/lib/libKF6ConfigCore.so.6 #2 0x00007f4a38d93775 in ??? () at /usr/lib/libKF6ConfigCore.so.6 #3 0x00007f4a38d817b3 in ??? () at /usr/lib/libKF6ConfigCore.so.6 #4 0x00007f4a2c0c7200 in ??? () at /usr/lib/qt6/plugins/org.kde.kdecoration3/org.kde.klassy.so #5 0x00007f4a375d734f in ??? () at /usr/lib/libQt6Core.so.6 #6 0x00007f4a3a5f0163 in KDecoration3::DecoratedWindow::paletteChanged(QPalette const&) () at /usr/lib/libkdecorations3.so.6 #7 0x00007f4a375d734f in ??? () at /usr/lib/libQt6Core.so.6 #8 0x00007f4a3a077f90 in KWin::Window::paletteChanged(QPalette const&) () at /usr/lib/libkwin.so.6 #9 0x00007f4a3a065239 in KWin::Window::handlePaletteChange() () at /usr/lib/libkwin.so.6 #10 0x00007f4a375d734f in ??? () at /usr/lib/libQt6Core.so.6 #11 0x00007f4a375d734f in ??? () at /usr/lib/libQt6Core.so.6 #12 0x00007f4a38daf2b4 in KConfigWatcher::configChanged(KConfigGroup const&, QList<QByteArray> const&) () at /usr/lib/libKF6ConfigCore.so.6 #13 0x00007f4a38db5499 in ??? () at /usr/lib/libKF6ConfigCore.so.6 #14 0x00007f4a38db5762 in KConfigWatcher::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/libKF6ConfigCore.so.6 #15 0x00007f4a37b80b71 in ??? () at /usr/lib/libQt6DBus.so.6 #16 0x00007f4a375c4994 in QObject::event(QEvent*) () at /usr/lib/libQt6Core.so.6 #17 0x00007f4a387021c0 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6 #18 0x00007f4a3756a958 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6 #19 0x00007f4a3756ad30 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt6Core.so.6 #20 0x00007f4a3772dd4d in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6 #21 0x00007f4a38334b73 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Gui.so.6 #22 0x00007f4a37575786 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6 #23 0x00007f4a3756f3f1 in QCoreApplication::exec() () at /usr/lib/libQt6Core.so.6 #24 0x000055f4a6a929e2 in ??? () #25 0x00007f4a36c27635 in ??? () at /usr/lib/libc.so.6 #26 0x00007f4a36c276e9 in __libc_start_main () at /usr/lib/libc.so.6 #27 0x000055f4a6a9a135 in ??? ()