https://bugs.kde.org/show_bug.cgi?id=510866
Bug ID: 510866
Summary: plasma-shell hangs and eats 100% CPU after update
Classification: Plasma
Product: plasmashell
Version First 6.4.5
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: Panel
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
SUMMARY
I just updated my system, which included a plasma-shell update, amongst many
others. I can log in, all my apps start and work correctly, but the taskbar is
missing, the desktop is unresponsive (e.g. context menu doesn't open at all)
and the plasma-shell process is spinning at 100% CPU.
SOFTWARE/OS VERSIONS
Linux: Arch Linux, kernel 6.17.3-arch2-1
KDE Plasma Version: 6.4.5, running on X.Org X Server 1.21.1.18
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
HW: ThinkPad P14s Gen 5 (AMD) 21ME
GPU/drivers: AMD Radeon 780M Graphics (radeonsi, phoenix, LLVM 20.1.8, DRM
3.64, 6.17.3-arch2-1)
ADDITIONAL INFORMATION
The main thread of `/usr/bin/plasmashell --no-respawn` is spamming futex
syscalls:
futex(0x7feadc006e38, FUTEX_WAIT_BITSET, 2, NULL, FUTEX_BITSET_MATCH_ANY) =
-1 EAGAIN (Resource temporarily unavailable) <0.000009>
Stacktrace during the futex() call:
#0 0x00007feaf1f1876d in syscall () from /usr/lib/libc.so.6
#1 0x00007feae1712b7b in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#2 0x00007feae1720163 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#3 0x00007feae172138c in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#4 0x00007feae1ba986b in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#5 0x00007feae1baa108 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#6 0x00007feae19664b2 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#7 0x00007feae12dbc32 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#8 0x00007feae12dd772 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#9 0x00007feae123e2d0 in ?? () from /usr/lib/libgallium-25.2.4-arch1.2.so
#10 0x00007feaea3d1a14 in ?? () from /usr/lib/libGLX_mesa.so.0
#11 0x00007feaea3d40a9 in ?? () from /usr/lib/libGLX_mesa.so.0
#12 0x00007feaeb8edb7e in ?? () from
/usr/lib/qt6/plugins/xcbglintegrations/libqxcb-glx-integration.so
#13 0x00007feaf339cf1e in QOpenGLContext::destroy() () from
/usr/lib/libQt6Gui.so.6
#14 0x00007feaf339cf9f in QOpenGLContext::~QOpenGLContext() () from
/usr/lib/libQt6Gui.so.6
#15 0x000055afc77f1d5b in vendorIsNVidia () at
/usr/src/debug/plasma-workspace/plasma-workspace-6.4.5/shell/panelview.cpp:154
#16 operator() (__closure=<optimized out>) at
/usr/src/debug/plasma-workspace/plasma-workspace-6.4.5/shell/panelview.cpp:168
#17 PanelView::isUnsupportedEnvironment (this=0x55aff9253b50) at
/usr/src/debug/plasma-workspace/plasma-workspace-6.4.5/shell/panelview.cpp:169
#18 0x000055afc77f4e3e in PanelView::defaultFloating (this=0x55aff9253b50) at
/usr/src/debug/plasma-workspace/plasma-workspace-6.4.5/shell/panelview.cpp:175
#19 PanelView::restore (this=0x55aff9253b50) at
/usr/src/debug/plasma-workspace/plasma-workspace-6.4.5/shell/panelview.cpp:905
#20 0x000055afc786d5c8 in ?? ()
#21 0x0000000000000000 in ?? ()
The line where the faulty QOpenGLContext destructor is called is:
149 QOpenGLFunctions funcs(&context);
150 const QString vendor =
QString::fromLocal8Bit(reinterpret_cast<const char
*>(funcs.glGetString(GL_VENDOR)));
151 return vendor.contains(u"NVIDIA", Qt::CaseInsensitive);
152 }
153 return false;
--> 154 }
155
I tried restarting plasma-shell, but it didn't help, it always hangs.
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