SUMMARY
GUI becomes completely unersponsive as soon as any Electron-based application, such as Slack or Atom is run with --ozone-platform=wayland. Any headless processes still work, e.g. nginx, KDE Connect and Docker workloads, but terminating session with kquitapp5 plasmashell; kstart5 plasmashell doesn't do anything.

P.S. I KNOW THAT BACKTRACE FILE IS EMPTY. I can't do anything after triggering this hang, including syncing GDB state to disk.


STEPS TO REPRODUCE
Run %app% --ozone-platform=wayland &

OBSERVED RESULT
GUI becomes completely unersponsive as soon as any Electron-based application, such as Slack or Atom is run with --ozone-platform=wayland. Any headless processes still work, e.g. nginx, KDE Connect and Docker workloads, but terminating session with kquitapp5 plasmashell; kstart5 plasmashell doesn't do anything.


EXPECTED RESULT
No freezes, app uses wayland backend and fractional scaling

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.26.4
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
Kernel Version: 6.1.1-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 9 5900HX with Radeon Graphics
Memory: 30,7 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: LENOVO
Product Name: 20YM
System Version: Lenovo ThinkBook 16p Gen 2

ADDITIONAL INFORMATION

KWin version: 5.26.4
Qt Version: 5.15.7
Qt compile version: 5.15.7
XCB compile version: 1.15

Operation Mode: Xwayland

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_X11_XCB: yes
HAVE_EPOXY_GLX: yes
HAVE_WAYLAND_EGL: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 12201007
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: false
alphaChannelSupported: true
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 5, 9, 4, 3
decorationButtonsRight: 
borderSize: 3
gridUnit: 10
font: Noto Sans,10,-1,0,50,0,0,0,0,0
smallSpacing: 2
largeSpacing: 10

Platform
==========
Name: DRM
Active: true
Atomic Mode Setting on GPU 0: true
Atomic Mode Setting on GPU 1: true

Cursor
======
themeName: breeze_cursors
themeSize: 24

Options
=======
focusPolicy: 0
xwaylandCrashPolicy: 
xwaylandMaxCrashCount: 3
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
activeMouseScreen: true
placement: 
activationDesktopPolicy: 0
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: false
focusStealingPreventionLevel: 0
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 28
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 28
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 28
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: false
compositingMode: 1
useCompositing: true
hiddenPreviews: 1
glSmoothScale: 1
glStrictBinding: false
glStrictBindingFollowsDriver: true
glPreferBufferSwap: 101
glPlatformInterface: 2
windowsBlockCompositing: true
latencyPolicy: 
renderTimeEstimator: 

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: false
cursorPushBackDistance: 1x1
timeThreshold: 150
reActivateThreshold: 350
actionTopLeft: 0
actionTop: 0
actionTopRight: 1
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Active screen follows mouse:  yes
Number of Screens: 2

Screen 0:
---------
Name: eDP-2
Enabled: 1
Geometry: 0,1440,1707x1067
Scale: 1.5
Refresh Rate: 60001
Adaptive Sync: automatic
Screen 1:
---------
Name: DP-3
Enabled: 1
Geometry: 0,0,2560x1440
Scale: 1.5
Refresh Rate: 59996
Adaptive Sync: automatic

Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: AMD
OpenGL renderer string: AMD Radeon Graphics (renoir, LLVM 14.0.6, DRM 3.49, 6.1.1-arch1-1)
OpenGL version string: 4.6 (Core Profile) Mesa 22.3.1
OpenGL platform interface: EGL
OpenGL shading language version string: 4.60
Driver: Unknown
GPU class: Unknown
OpenGL version: 4.6
GLSL version: 4.60
Mesa version: 22.3.1
Linux kernel version: 6.1.1
Direct rendering: Requires strict binding: no
GLSL shaders:  yes
Texture NPOT support:  yes
Virtual Machine:  no
OpenGL 2 Shaders are used

Loaded Effects:
---------------
kwin4_effect_logout
kwin4_effect_scale
kwin4_effect_login
kwin4_effect_sessionquit
kwin4_effect_morphingpopups
kwin4_effect_fadingpopups
kwin4_effect_fullscreen
kwin4_effect_translucency
kwin4_effect_dialogparent
kwin4_effect_squash
kwin4_effect_frozenapp
kwin4_effect_windowaperture
colorpicker
outputlocator
blendchanges
screenshot
screenedge
slidingpopups
magiclamp
slide
sheet
desktopgrid
highlightwindow
overview
windowview
wobblywindows
blur
contrast
startupfeedback
kscreen
screentransform

Currently Active Effects:
-------------------------
blur
contrast

Effect Settings:
----------------
kwin4_effect_logout:
pluginId: kwin4_effect_logout
isActiveFullScreenEffect: false

kwin4_effect_scale:
pluginId: kwin4_effect_scale
isActiveFullScreenEffect: false

kwin4_effect_login:
pluginId: kwin4_effect_login
isActiveFullScreenEffect: false

kwin4_effect_sessionquit:
pluginId: kwin4_effect_sessionquit
isActiveFullScreenEffect: false

kwin4_effect_morphingpopups:
pluginId: kwin4_effect_morphingpopups
isActiveFullScreenEffect: false

kwin4_effect_fadingpopups:
pluginId: kwin4_effect_fadingpopups
isActiveFullScreenEffect: false

kwin4_effect_fullscreen:
pluginId: kwin4_effect_fullscreen
isActiveFullScreenEffect: false

kwin4_effect_translucency:
pluginId: kwin4_effect_translucency
isActiveFullScreenEffect: false

kwin4_effect_dialogparent:
pluginId: kwin4_effect_dialogparent
isActiveFullScreenEffect: false

kwin4_effect_squash:
pluginId: kwin4_effect_squash
isActiveFullScreenEffect: false

kwin4_effect_frozenapp:
pluginId: kwin4_effect_frozenapp
isActiveFullScreenEffect: false

kwin4_effect_windowaperture:
pluginId: kwin4_effect_windowaperture
isActiveFullScreenEffect: false

colorpicker:

outputlocator:

blendchanges:

screenshot:

screenedge:

slidingpopups:
slideInDuration: 150
slideOutDuration: 250

magiclamp:

slide:
horizontalGap: 45
verticalGap: 20
slideDocks: false
slideBackground: true

sheet:
duration: 300

desktopgrid:
activeView: 
gridRows: 1
gridColumns: 1
animationDuration: 300
layout: 1
partialActivationFactor: 0
gestureInProgress: false
showAddRemove: true
desktopNameAlignment: 0
desktopLayoutMode: 0
customLayoutRows: 2

highlightwindow:

overview:
activeView: 
animationDuration: 300
layout: 1
ignoreMinimized: false
blurBackground: true
partialActivationFactor: 0
gestureInProgress: false
searchText: 

windowview:
activeView: 
animationDuration: 300
layout: 1
ignoreMinimized: false
mode: 0
partialActivationFactor: 0
gestureInProgress: false
searchText: 

wobblywindows:
stiffness: 0.15
drag: 0.8
moveFactor: 0.1
xTesselation: 20
yTesselation: 20
minVelocity: 0
maxVelocity: 1000
stopVelocity: 0.5
minAcceleration: 0
maxAcceleration: 1000
stopAcceleration: 0.5
moveWobble: true
resizeWobble: false

blur:

contrast:

startupfeedback:
type: 1

kscreen:

screentransform:


Loaded Plugins:
---------------
kwin5_plugin_buttonrebinds
kwin5_plugin_colord
kwin5_plugin_krunner
kwin5_plugin_nightcolor
kwin5_plugin_screencast

Available Plugins:
------------------
kwin5_plugin_buttonrebinds
kwin5_plugin_colord
kwin5_plugin_krunner
kwin5_plugin_nightcolor
kwin5_plugin_screencast