https://bugs.kde.org/show_bug.cgi?id=500110
Bug ID: 500110
Summary: plasmashell crash in Qt handleScreensChanged() on
monitor change
Classification: Plasma
Product: plasmashell
Version: 6.3.0
Platform: Arch Linux
OS: Linux
Status: REPORTED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: generic-crash
Assignee: plasma-b...@kde.org
Reporter: jpe...@petsovits.com
Target Milestone: 1.0
Application: plasmashell (6.3.0)
ApplicationNotResponding [ANR]: false
Qt Version: 6.8.2
Frameworks Version: 6.10.0
Operating System: Linux 6.12.10-arch1-1 x86_64
Windowing System: Wayland
Distribution: "Arch Linux"
DrKonqi: 6.3.0 [CoredumpBackend]
-- Information about the crash:
This happened on a Wayland session, after plugging in the USB-C cable with
Alt-DP monitor connection. Using the officlal new Arch 6.3.0 packages, but I've
seen the same crash many times on my dev session before. Now it's all the
latest released distro binaries and Qt 6.8.2 symbols though (previous crashes
happened on 6.8.1 too, and for probably well over a month).
I use a 4K monitor with 125% scaling stacked on top of my regular 1080p laptop
display geometry. The bottom laptop display remains Primary and keeps owning
the panel. The external monitor has no panel, no widgets, and a different
background picture. Probably less relevant as the backtrace is all in Qt
internals. Attaching KWin support information from Info Center as well in case
something's interesting, with the crashing thread at the very bottom as per Dr.
Konqi.
Crash reproduces often, but not always. (At least on my dev session, haven't
been using release regularly enough to spot patterns.) I tend to get the crash
frequently when waking up with a different display configuration than before
the laptop went to sleep, but this time the session was already up and running
smoothly before I plugged in the monitor. Open windows are Firefox and Kate.
Nothing particularly exciting.
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: 6.3.0
Qt Version: 6.8.2
Qt compile version: 6.8.2
XCB compile version: 1.17.0
Operation Mode: Wayland
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: 12401005
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: Breeze
Plugin recommends border size: None
onAllDesktopsAvailable: true
alphaChannelSupported: true
closeOnDoubleClickOnMenu: true
decorationButtonsLeft: 0, 2, 9
decorationButtonsRight: 6, 3, 4, 5
borderSize: 2
gridUnit: 10
font: Noto Sans,10,-1,5,400,0,0,0,0,0,0,0,0,0,0,1
smallSpacing: 2
largeSpacing: 10
Output backend
==============
Name: DRM
Atomic Mode Setting on GPU 0: true
Cursor
======
themeName: Oxygen_White
themeSize: 24
Options
=======
focusPolicy: ClickToFocus
xwaylandCrashPolicy: 1
xwaylandMaxCrashCount: 3
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
activationDesktopPolicy: SwitchToOtherDesktop
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
edgeBarrier: 100
cornerBarrier: 1
rollOverDesktops: true
focusStealingPreventionLevel: 2
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: MouseRaise
commandActiveTitlebar2: MouseNothing
commandActiveTitlebar3: MouseOperationsMenu
commandInactiveTitlebar1: MouseActivateAndRaise
commandInactiveTitlebar2: MouseNothing
commandInactiveTitlebar3: MouseOperationsMenu
commandWindow1: MouseActivateRaiseAndPassClick
commandWindow2: MouseActivateAndPassClick
commandWindow3: MouseActivateAndPassClick
commandWindowWheel: MouseNothing
commandAll1: MouseUnrestrictedMove
commandAll2: MouseToggleRaiseAndLower
commandAll3: MouseUnrestrictedResize
keyCmdAllModKey: 16777250
doubleClickBorderToMaximize: true
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: false
killPingTimeout: 5000
compositingMode: 1
useCompositing: true
hiddenPreviews: 1
glSmoothScale: 2
glStrictBinding: true
glStrictBindingFollowsDriver: true
glPreferBufferSwap: AutoSwapStrategy
glPlatformInterface: 2
windowsBlockCompositing: true
allowTearing: true
interactiveWindowMoveEnabled: true
Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: false
cursorPushBackDistance: 1x1
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0
Screens
=======
Number of Screens: 2
Screen 0:
---------
Name: eDP-1
Enabled: 1
Geometry: 553,1728,1920x1080
Physical size: 309x174mm
Scale: 1
Refresh Rate: 59999
Adaptive Sync: incapable
Screen 1:
---------
Name: DP-1
Enabled: 1
Geometry: 0,0,3072x1728
Physical size: 697x392mm
Scale: 1.25
Refresh Rate: 59997
Adaptive Sync: incapable
Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (WHL GT2)
OpenGL version string: 4.6 (Core Profile) Mesa 24.3.4-arch1.1
OpenGL platform interface: EGL
OpenGL shading language version string: 4.60
Driver: Intel
GPU class: Whiskey Lake
OpenGL version: 4.6
GLSL version: 4.60
Mesa version: 24.3.4
X server version: 1.24.1
Linux kernel version: 6.12.10
Direct rendering: Requires strict binding: no
Virtual Machine: no
OpenGL 2 Shaders are used
Loaded Effects:
---------------
shakecursor
screenshot
outputlocator
colorpicker
zoom
screenedge
blur
contrast
login
sessionquit
logout
slidingpopups
windowaperture
slide
fullscreen
squash
fadingpopups
scale
maximize
frozenapp
dialogparent
windowview
tileseditor
overview
highlightwindow
blendchanges
startupfeedback
systembell
screentransform
kscreen
Currently Active Effects:
-------------------------
blur
contrast
Effect Settings:
----------------
shakecursor:
screenshot:
outputlocator:
colorpicker:
zoom:
zoomFactor: 1.2
mousePointer: 0
mouseTracking: 0
focusTrackingEnabled: false
textCaretTrackingEnabled: false
focusDelay: 350
moveFactor: 20
targetZoom: 1
screenedge:
blur:
contrast:
login:
pluginId: login
isActiveFullScreenEffect: false
sessionquit:
pluginId: sessionquit
isActiveFullScreenEffect: false
logout:
pluginId: logout
isActiveFullScreenEffect: false
slidingpopups:
slideInDuration: 200
slideOutDuration: 200
windowaperture:
pluginId: windowaperture
isActiveFullScreenEffect: false
slide:
horizontalGap: 45
verticalGap: 20
slideBackground: true
fullscreen:
pluginId: fullscreen
isActiveFullScreenEffect: false
squash:
pluginId: squash
isActiveFullScreenEffect: false
fadingpopups:
pluginId: fadingpopups
isActiveFullScreenEffect: false
scale:
pluginId: scale
isActiveFullScreenEffect: false
maximize:
pluginId: maximize
isActiveFullScreenEffect: false
frozenapp:
pluginId: frozenapp
isActiveFullScreenEffect: false
dialogparent:
pluginId: dialogparent
isActiveFullScreenEffect: false
windowview:
activeView:
delegate:
animationDuration: 300
ignoreMinimized: false
mode:
partialActivationFactor: 0
gestureInProgress: false
searchText:
selectedIds:
tileseditor:
activeView:
delegate:
animationDuration: 200
overview:
activeView:
delegate:
animationDuration: 300
ignoreMinimized: false
filterWindows: true
organizedGrid: true
overviewPartialActivationFactor: 0
overviewGestureInProgress: false
transitionPartialActivationFactor: 0
transitionGestureInProgress: false
gridPartialActivationFactor: 0
gridGestureInProgress: false
desktopOffset:
searchText:
highlightwindow:
blendchanges:
startupfeedback:
type: 1
systembell:
screentransform:
kscreen:
Loaded Plugins:
---------------
BounceKeysPlugin
KeyNotificationPlugin
StickyKeysPlugin
buttonsrebind
eis
krunnerintegration
nightlight
screencast
Available Plugins:
------------------
BounceKeysPlugin
KeyNotificationPlugin
StickyKeysPlugin
buttonsrebind
eis
krunnerintegration
nightlight
screencast
==========================
(end of KWin Support Information)
The crash can be reproduced sometimes.
-- Backtrace (Reduced):
#5 QWeakPointer<QObject>::internalData (this=0x0, this=<optimized out>) at
/usr/src/debug/qt6-base/qtbase/src/corelib/tools/qsharedpointer_impl.h:750
#6 QPointer<QScreen>::data (this=0x0, this=<optimized out>) at
/usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qpointer.h:75
#7 QPointer<QScreen>::operator QScreen* (this=0x0, this=<optimized out>) at
/usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qpointer.h:83
#8 QPlatformScreen::screen (this=this@entry=0x7f632c61e980) at
/usr/src/debug/qt6-base/qtbase/src/gui/kernel/qplatformscreen.cpp:116
#9 0x00007f6333b304b3 in QtWaylandClient::QWaylandWindow::handleScreensChanged
(this=0x5f06ca1c7870) at
/usr/src/debug/qt6-wayland/qtwayland/src/client/qwaylandwindow.cpp:1448
Reported using DrKonqi
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