Bugzilla – Bug 1222174
Switching to text console causes KDE6/X11 plasmashell high CPU usage
Last modified: 2024-04-21 22:29:25 UTC
When I switch to a text console (ctrl-alt-F1) and run an htop, I can see plasmashell periodically consuming 100% of a CPU. Plasmashell CPU stays at 100% for about 10 seconds then drops to normal for a few seconds then resumes at 100% for another 10 seconds. This is with TW 20240328, but it was happening on previous versions too. I'm using X11, KDE6, Nvidia 550.54.
Can you collect a backtrace (or multiple) of plasmashell while this happens? Or even better, use "perf record -e cpu-cycles --call-graph -p $(pidof plasmashell)" for a few secons and then "perf report" to view the most called functions.
Had to change/correct the command syntax a bit: perf record -p $(pidof plasmashell) -e cpu-cycles --call-graph fp perf report > perf.report head -200 perf.report ----------------- # Total Lost Samples: 0 # # Samples: 316K of event 'cpu-cycles' # Event count (approx.): 351806076106 # # Children Self Command Shared Object Symbol # ........ ........ ............... .............................................. ...................................................................................................................................................................................................................... # 36.49% 0.84% QSGRenderThread libc.so.6 [.] clock_gettime@@GLIBC_2.17 | --35.64%--clock_gettime@@GLIBC_2.17 | --35.64%--__vdso_clock_gettime 36.04% 36.02% QSGRenderThread [vdso] [.] __vdso_clock_gettime 13.65% 0.00% QSGRenderThread [unknown] [.] 0x0000440404400080 | ---0x440404400080 | |--1.74%--0x7f9e18dff4a4 | |--1.65%--0x7f9e18dff4c5 | |--1.64%--0x7f9e18ee3ea5 | --0.83%--0x7f9e1b080a60 10.02% 0.00% QSGRenderThread [unknown] [.] 0x00000000beee0100 | ---0xbeee0100 | |--2.50%--0x7f9e1b0800b7 | |--2.48%--0x557447ab2b90 | --0.85%--__GI___pthread_self 9.96% 0.00% QSGRenderThread [unknown] [k] 0x0000441f0fc301f0 | ---0x441f0fc301f0 | |--3.73%--__GI___pthread_mutex_unlock_usercnt | |--0.83%--__pthread_equal | --0.82%--__GI___pthread_self 9.68% 9.67% QSGRenderThread libc.so.6 [.] __printf_buffer | |--8.43%--__printf_buffer | --1.26%--0xfff760e400000038 __printf_buffer 5.37% 0.00% QSGRenderThread [unknown] [.] 0x00000000306d5f6c | ---0x306d5f6c | --5.37%--pthread_mutex_lock@@GLIBC_2.2.5 5.37% 5.36% QSGRenderThread libc.so.6 [.] pthread_mutex_lock@@GLIBC_2.2.5 | --5.36%--0x306d5f6c pthread_mutex_lock@@GLIBC_2.2.5 3.74% 3.73% QSGRenderThread libc.so.6 [.] __GI___pthread_mutex_unlock_usercnt | --3.73%--0x441f0fc301f0 __GI___pthread_mutex_unlock_usercnt 2.51% 2.51% QSGRenderThread libc.so.6 [.] __strchrnul_avx2 | ---__strchrnul_avx2 2.50% 0.00% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x00007f9e1b0800b7 | ---0x7f9e1b0800b7 2.49% 2.49% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x00000000000530b7 | --2.49%--0xbeee0100 0x7f9e1b0800b7 2.48% 0.00% QSGRenderThread [unknown] [.] 0x0000557447ab2b90 | ---0x557447ab2b90 2.09% 2.09% QSGRenderThread libc.so.6 [.] ___vsnprintf | ---___vsnprintf 1.74% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18dff4a4 | ---0x7f9e18dff4a4 1.74% 1.74% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009ff4a4 | ---0x440404400080 0x7f9e18dff4a4 1.67% 1.67% QSGRenderThread libc.so.6 [.] __GI___pthread_self | |--0.85%--0xbeee0100 | __GI___pthread_self | --0.82%--0x441f0fc301f0 __GI___pthread_self 1.66% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18dff401 | ---0x7f9e18dff401 1.66% 1.66% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009ff401 1.66% 0.00% QSGRenderThread [unknown] [.] 0xfff760e400000038 | ---0xfff760e400000038 | --1.26%--__printf_buffer 1.65% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18dff4c5 | ---0x7f9e18dff4c5 1.65% 1.65% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009ff4c5 | ---0x440404400080 0x7f9e18dff4c5 1.64% 1.64% QSGRenderThread libc.so.6 [.] __printf_buffer_write | --1.24%--__printf_buffer_write 1.64% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18ee3ea5 | ---0x7f9e18ee3ea5 1.63% 1.63% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x0000000000ae3ea5 | ---0x440404400080 0x7f9e18ee3ea5 0.85% 0.85% QSGRenderThread libc.so.6 [.] __printf_buffer_done | ---__printf_buffer_done 0.84% 0.84% QSGRenderThread libc.so.6 [.] __memmove_avx_unaligned_erms | --0.83%--__memmove_avx_unaligned_erms 0.84% 0.83% QSGRenderThread libc.so.6 [.] __pthread_equal | --0.83%--0x441f0fc301f0 __pthread_equal 0.83% 0.00% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x00007f9e1b080a60 | ---0x7f9e1b080a60 0.83% 0.83% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x0000000000053a60 | ---0x440404400080 0x7f9e1b080a60 0.82% 0.82% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009e8680 0.82% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18de8680 | ---0x7f9e18de8680 0.81% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18de8684 | ---0x7f9e18de8684 0.81% 0.81% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009e8684 0.80% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18de8691 | ---0x7f9e18de8691 0.80% 0.80% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009e8691 0.48% 0.00% QSGRenderThread [kernel.kallsyms] [k] entry_SYSCALL_64_after_hwframe 0.48% 0.00% QSGRenderThread [kernel.kallsyms] [k] do_syscall_64 0.46% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18dff4a0 0.46% 0.46% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009ff4a0 0.45% 0.00% QSGRenderThread libc.so.6 [.] __GI___ioctl 0.45% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18ee3e66 0.45% 0.45% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x0000000000ae3e66 0.44% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18de86be 0.44% 0.00% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x00007f9e1b080abc 0.44% 0.44% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009ff3e6 0.44% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18dff3e6 0.44% 0.44% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00000000009e86be 0.44% 0.44% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x0000000000053abc 0.44% 0.00% QSGRenderThread [kernel.kallsyms] [k] __x64_sys_ioctl 0.44% 0.00% QSGRenderThread [kernel.kallsyms] [k] nvidia_unlocked_ioctl 0.44% 0.00% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x00007f9e18ee3ea8 0.44% 0.44% QSGRenderThread libnvidia-glcore.so.550.54.14 [.] 0x0000000000ae3ea8 0.44% 0.44% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x0000000000053ae9 0.44% 0.00% QSGRenderThread libGLX_nvidia.so.550.54.14 [.] 0x00007f9e1b080ae9 -------------
I think this has something to do with my user login. I tried another user login and it did not behave in this manner. It's probable than some pre-KDE6 config or setting in my normal login is lurking and causing the issue.
Created attachment 874398 [details] perf report PS results at same time USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 13686 7.8 1.0 926116 358788 ? Ssl 17:02 0:12 /usr/libexec/packagekitd me 11481 3.1 0.9 2736820 303336 ? Sl 16:58 0:13 | | \_ /usr/lib64/firefox/firefox -contentproc -childID 8 -isForBrowser -prefsLen 33783 -prefMapSize 240114 -jsInitLen 234952 -parentBuildID 20240401114208 -greomni /usr/lib64/firefox/omni.ja -appomni /usr/lib64/firefox/browser/omni.ja -appDir /usr/lib64/firefox/browser {3c5f4c37-fec8-48e6-9247-d7eb1b844ecf} 10796 true tab me 8290 249 2.1 3979420 702224 ? Ssl 16:57 19:33 \_ /usr/bin/plasmashell --no-respawn root 7369 24.6 1.7 854204 559628 tty2 Rsl+ 16:54 2:47 \_ /usr/bin/Xorg.bin -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_xzEHyo -noreset -displayfd 16 me 13199 2.2 0.4 2384036 151916 ? Sl 17:01 0:05 | \_ /usr/bin/konsole vscan 7261 1.9 4.2 1488508 1379456 ? Ssl 16:54 0:13 /usr/sbin/clamd me 11021 1.6 0.6 19620248 229668 ? Sl 16:58 0:07 | | \_ /usr/lib64/firefox/firefox -contentproc -childID 2 -isForBrowser -prefsLen 47723 -prefMapSize 240114 -jsInitLen 234952 -parentBuildID 20240401114208 -greomni /usr/lib64/firefox/omni.ja -appomni /usr/lib64/firefox/browser/omni.ja -appDir /usr/lib64/firefox/browser {1d611496-1c5e-48cd-8b59-324498f3089f} 10796 true tab me 10796 13.6 1.9 3491648 625404 ? Sl 16:58 1:00 | \_ /usr/lib64/firefox/firefox me 8124 101 2.2 2703804 753844 ? Ssl 16:57 7:57 \_ /usr/bin/kwin_x11 --replace
Recent re-install of TW w/ Plasma6 shows very high (>25% of total CPU resources avaible) use by Plashmashell and KWin X11. Cannot get to start on Wayland, so that isn't much help. Kernel: 6.8.7-1-default arch: x86_64 bits: 64 compiler: gcc v: 13.2.1 Desktop: KDE Plasma v: 6.0.4 Distro: openSUSE Tumbleweed 20240419 10:53 ~ $ inxi -t -cm10 -xxx Processes: CPU top: 10 of 347 1: cpu: 217% command: plasmashell pid: 8193 mem: 968.2 MiB (3.0%) 2: cpu: 101% command: kwin_x11 pid: 8030 mem: 1523.2 MiB (4.7%) 3: cpu: 36.6% command: Xorg.bin pid: 7326 mem: 806.7 MiB (2.5%) 4: cpu: 7.2% command: firefox pid: 24944 mem: 613.6 MiB (1.9%) 5: cpu: 2.2% command: firefox pid: 25255 mem: 468.5 MiB (1.4%) 6: cpu: 1.6% command: firefox pid: 25160 mem: 187.1 MiB (0.5%) 7: cpu: 1.1% command: kactivitymanagerd pid: 8231 mem: 81.8 MiB (0.2%) 8: cpu: 1.1% command: konsole pid: 13471 mem: 167.5 MiB (0.5%) 9: cpu: 0.7% command: firefox pid: 25546 mem: 261.3 MiB (0.8%) 10: cpu: 0.6% command: upowerd pid: 7706 mem: 22.6 MiB (0.0%) System RAM: total: 32 GiB available: 31.3 GiB used: 8.54 GiB (27.3%) Memory top: 10 of 347 1: mem: 1523.2 MiB (4.7%) command: kwin_x11 pid: 8030 cpu: 101% 2: mem: 1346.9 MiB (4.2%) command: clamd pid: 7213 cpu: 0.2% 3: mem: 968.2 MiB (3.0%) command: plasmashell pid: 8193 cpu: 217% 4: mem: 806.7 MiB (2.5%) command: Xorg.bin pid: 7326 cpu: 36.6% 5: mem: 613.6 MiB (1.9%) command: firefox pid: 24944 cpu: 7.2% 6: mem: 468.5 MiB (1.4%) command: firefox pid: 25255 cpu: 2.2% 7: mem: 302.9 MiB (0.9%) command: arangod pid: 7330 cpu: 0.4% 8: mem: 261.3 MiB (0.8%) command: firefox pid: 25546 cpu: 0.7% 9: mem: 235.9 MiB (0.7%) command: DiscoverNotifier pid: 8490 cpu: 0.0% 10: mem: 224.8 MiB (0.7%) command: mysqld pid: 7315 cpu: 0.0% Efforts to clear out all old Plasmoids and even deletng all old Plasma/KDE settings failed to have any impact. As I noticed it after a DUP that included a kernel update I tested it w/ old kernel but same problem. See below. I was able t dump some data from dbus: 15:51 ~ $ qdbus org.kde.KWin /KWin supportInformation KWin Support Information: The following information should be used when requesting support on e.g. https://discuss.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 https://paste.kde.org instead of pasting into support threads. ========================== Version ======= KWin version: 6.0.4 Qt Version: 6.7.0 Qt compile version: 6.7.0 XCB compile version: 1.17.0 Operation Mode: X11 only Build Options ============= KWIN_BUILD_DECORATIONS: yes KWIN_BUILD_TABBOX: yes KWIN_BUILD_ACTIVITIES: yes HAVE_X11_XCB: yes HAVE_GLX: yes X11 === Vendor: The X.Org Foundation Vendor Release: 12101012 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.breeze Theme: Plugin recommends border size: None onAllDesktopsAvailable: true alphaChannelSupported: true closeOnDoubleClickOnMenu: false decorationButtonsLeft: 0, 2 decorationButtonsRight: 6, 3, 4, 5 borderSize: 0 gridUnit: 10 font: Noto Sans,10,-1,0,400,0,0,0,0,0,0,0,0,0,0,1 smallSpacing: 2 largeSpacing: 10 Output backend ============== Name: KWin::X11StandaloneBackend Cursor ====== themeName: breeze_cursors themeSize: 24 Options ======= focusPolicy: ClickToFocus xwaylandCrashPolicy: 1 xwaylandMaxCrashCount: 3 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: false shadeHoverInterval: 250 I don't know if any of the output from plasmashell -d is of use: KPackageStructure of KPluginMetaData(pluginId:"org.kde.plasma.clearclock", fileName: "/home/me/.local/share/plasma/plasmoids/org.kde.plasma.clearclock/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"Plasma.Control.Hub", fileName: "/home/me/.local/share/plasma/plasmoids/Plasma.Control.Hub/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"com.github.configurable_button", fileName: "/home/me/.local/share/plasma/plasmoids/com.github.configurable_button/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"org.kde.Date.Bubble.P6", fileName: "/home/me/.local/share/plasma/plasmoids/org.kde.Date.Bubble.P6/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"com.nemmayan.clock", fileName: "/home/me/.local/share/plasma/plasmoids/com.nemmayan.clock/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"org.kde.plasma.worldclock", fileName: "/usr/share/plasma/plasmoids/org.kde.plasma.worldclock/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"org.papylhomme.diskmonitor", fileName: "/usr/share/plasma/plasmoids/org.papylhomme.diskmonitor/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"org.kde.weatherWidget", fileName: "/usr/share/plasma/plasmoids/org.kde.weatherWidget/metadata.json") does not match requested format "Plasma/Applet" KPackageStructure of KPluginMetaData(pluginId:"org.kde.kupapplet", fileName: "/usr/share/plasma/plasmoids/org.kde.kupapplet/metadata.json") does not match requested format "Plasma/Applet" kf.plasma.quick: Applet preload policy set to 1 file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:196:25: QML FolderViewDropArea (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "minimumWidth" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/main.qml:196:25: QML FolderViewDropArea (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "minimumWidth" qt.svg.draw: The requested buffer size is too big, ignoring org.kde.plasma.kicker: Entry is not valid "writer.desktop" 0x5585eb583120 org.kde.plasma.kicker: Entry is not valid "org.kde.Help.desktop" 0x5585eb5810c0 file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/main.qml:162:21: QML KSortFilterProxyModel: Binding loop detected for property "sourceModel" file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/main.qml:162:21: QML KSortFilterProxyModel: Binding loop detected for property "sourceModel" qml: SystemTray ItemLoader: Invalid state, cannot determine source! qt.dbus.integration: Could not connect "org.cups.cupsd.Notifier" to PrinterFinishingsChanged(QString, QString, QString, uint, QString, bool) : Process "nordvpn status" already running. Pid: 9465 QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0 Advice about using journalctl not very helpful: From journalctl: Apr 21 11:39:27 beryl plasmashell[7736]: kf.kio.core: -miniicon isn't supported anymore (service "" ) Apr 21 11:39:27 beryl plasmashell[7736]: kf.kio.core: -miniicon isn't supported anymore (service "" ) Apr 21 11:39:28 beryl plasmashell[7736]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo" : "org.freedesktop.DBus.Error.NotSupported" "" Apr 21 11:39:28 beryl plasmashell[7736]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo" : "org.freedesktop.DBus.Error.NotSupported" "" Apr 21 11:41:53 beryl plasmashell[7736]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo" : "org.freedesktop.DBus.Error.NotSupported" "" Apr 21 11:41:53 beryl plasmashell[7736]: kf.runner: Error requesting matches; calling "org.kde.runners.baloo" : "org.freedesktop.DBus.Error.NotSupported" "" Apr 21 11:56:46 beryl plasmashell[7736]: file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml:136: TypeError: Cannot read property 'screenGeometry' of null Apr 21 11:56:47 beryl plasmashell[7736]: QObject::killTimer: Timers cannot be stopped from another thread Apr 21 11:56:47 beryl plasmashell[7736]: QObject::~QObject: Timers cannot be stopped from another thread Apr 21 11:56:47 beryl plasmashell[7736]: file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml: This is what I could get from KWin: Efforts to use GDB to get a backtrace were not so helpful: Thread 60 (Thread 0x7fbdb9e006c0 (LWP 30326) "Thread (pooled)"): #0 0x00007fbe3228effe in __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x7fbdb9dff9b0, op=137, expected=0, futex_word=0x5652ed50c740) at futex-internal.c:57 #1 __futex_abstimed_wait_common (futex_word=futex_word@entry=0x5652ed50c740, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7fbdb9dff9b0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87 #2 0x00007fbe3228f09f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x5652ed50c740, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7fbdb9dff9b0, private=private@entry=0) at futex-internal.c:139 #3 0x00007fbe32292065 in __pthread_cond_wait_common (abstime=0x7fbdb9dff9b0, clockid=1, mutex=0x5652ed50c6f0, cond=0x5652ed50c718) at pthread_cond_wait.c:503 #4 ___pthread_cond_timedwait64 (cond=0x5652ed50c718, mutex=0x5652ed50c6f0, abstime=0x7fbdb9dff9b0) at pthread_cond_wait.c:643 #5 0x00007fbe32cf9413 in QWaitConditionPrivate::wait_relative(QDeadlineTimer) (deadline=..., this=0x5652ed50c6f0) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qwaitcondition_unix.cpp:92 #6 QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x5652ed50c6f0) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qwaitcondition_unix.cpp:100 #7 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x5652e4c9be48, deadline=...) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qwaitcondition_unix.cpp:180 #8 0x00007fbe32cf3d49 in QThreadPoolThread::run() (this=0x5652e98841a0) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qthreadpool.cpp:116 #9 0x00007fbe32cecea9 in operator() (__closure=<optimized out>) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qthread_unix.cpp:326 #10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qthread_unix.cpp:262 #11 QThreadPrivate::start(void*) (arg=0x5652e98841a0) at /usr/src/debug/qtbase-everywhere-src-6.7.0/src/corelib/thread/qthread_unix.cpp:285 #12 0x00007fbe32292bb2 in start_thread (arg=<optimized out>) at pthread_create.c:447 #13 0x00007fbe3231400c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78