Bug 398474

Summary: Kwin sometimes freezes, consuming 100% of one CPU core
Product: [Plasma] kwin Reporter: Kishore Gopalakrishnan <kishore96>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: major CC: kroppy1q
Priority: NOR    
Version First Reported In: 5.13.5   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Kishore Gopalakrishnan 2018-09-11 03:57:05 UTC 
Sometimes kwin freezes, and does not respond to mouse movement, keyboard shortcuts etc. It usually happens when I am triggering the 'desktop grid' effect via a screen corner, and the animation just stops halfway. However, I cannot reporduce this consistently, and I am not sure if this is actually the trigger. 

If I switch to a tty during such a freeze and open htop, I find that kwin_x11 is taking 100% of a CPU core. It does not respond to SIGTERM, so I usually have to send SIGKILL and then start kwin again. 

I tried to capture to output of kwin during one such run (by starting kwin using something like 'nohup kwin_x11 --replace > kwin_log_20180911-0915.txt &', and it is below:

OpenGL vendor string:                   Intel Open Source Technology Center
OpenGL renderer string:                 Mesa DRI Intel(R) Haswell Mobile 
OpenGL version string:                  4.5 (Core Profile) Mesa 18.1.8
OpenGL shading language version string: 4.50
Driver:                                 Intel
GPU class:                              Haswell
OpenGL version:                         4.5
GLSL version:                           4.50
Mesa version:                           18.1.8
X server version:                       1.20.1
Linux kernel version:                   4.18.6
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
kwin_x11: ../libepoxy/src/dispatch_common.c:858: epoxy_get_proc_address: Assertion `0 && "Couldn't find current GLX or EGL context.\n"' failed.

After the last line, there is some stuff about raising a crash handler, which I assume happens when I kill the process. 

I am runnning Arch Linux, and using the 'xf86-video-intel' driver. I am not sure what other information would be relevant here.
Comment 1 kroppy1q 2018-10-26 13:33:58 UTC 
I think I am suffering from the same bug, and I seem to be able to reproduce it consistently:

(0. Set a keyboard shortcut for showing the desktop grid (I use meta+d))
1. Let a tooltip appear (I hovered a chrome-tab for this)
2. While the tooltip starts to appear (during half a second or so), hit the shortcut to show the desktop grid.
3. Displays freeze (desktop grid animation doesn't seem to have started), mouse cursor can move. kwin_x11 is running 100% on one core. kwin_x11 does not respond to SIGTERM (but SIGKILL works).
4. After a long wait, things go back to normal without needing to kill kwin_x11

I am running an up-to-date openSuSE Leap 42.3. This has been happening to me for over a year. It also seems to be triggered by different tooltips/notifications/pop-ups, or something else altogether.

I also captured output of kwin_x11 using nohup kwin_x11 --replace > kwin.log &, contents of this log file below, along with the out put of lspci -k, and /usr/lib64/qt5/bin/qdbus org.kde.KWin /KWin supportInformation

-------------------------- BEGIN kwin.log (*snipped* repeating lines) -----------
QXcbConnection: XCB error: 3 (BadWindow), sequence: 178, resource id: 132120582, major code: 20 (GetProperty), minor code: 0
Module 'org.kde.kwin.decoration' does not contain a module identifier directive - it cannot be protected from external registrations.
The image "/home/huib/.local/share/aurorae/themes/BlackSquare/minimize.svgz" doesn't contain any of the prefixes ("pressed-inactive")
*snip* repeated lines of the following format: The image "/home/huib/.local/share/aurorae/themes/BlackSquare/<...>.svgz" doesn't contain any of the prefixes ("<...>")
OpenGL vendor string:                   Intel Open Source Technology Center
OpenGL renderer string:                 Mesa DRI Intel(R) Kabylake GT2 
OpenGL version string:                  4.5 (Core Profile) Mesa 17.0.5
OpenGL shading language version string: 4.50
Driver:                                 Intel
GPU class:                              Unknown
OpenGL version:                         4.5
GLSL version:                           4.50
Mesa version:                           17.0.5
X server version:                       1.18.3
Linux kernel version:                   4.4.155
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-effect.desktop, tried ("/home/huib/.local/share", "/usr/share")
*above line repeated multiple times*
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/huib/.local/share", "/usr/share")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/huib/.local/share", "/usr/share")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/huib/.local/share", "/usr/share")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/huib/.local/share", "/usr/share")
The image "/home/huib/.local/share/aurorae/themes/BlackSquare/decoration.svgz" doesn't contain any of the prefixes ("innerborder-inactive")
*snip* repeated lines of the following format: The image "/home/huib/.local/share/aurorae/themes/BlackSquare/<...>.svgz" doesn't contain any of the prefixes ("<...>")
The image "widgets/button" doesn't contain any of the prefixes ("shadow")
The image "widgets/button" doesn't contain any of the prefixes ("shadow")
-------------------------- END LOG ---------------------

-------- BEGIN OUTPUT COMMAND "lspci -k" ---------
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
        Subsystem: Hewlett-Packard Company Device 826b
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 05)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:02.0 VGA compatible controller: Intel Corporation Device 591b (rev 04)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: i915
        Kernel modules: i915
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 05)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: proc_thermal
        Kernel modules: processor_thermal_device
00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-H Thermal subsystem (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-H Serial IO I2C Controller #0 (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: intel-lpss
        Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Sunrise Point-H CSME HECI #1 (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: mei_me
        Kernel modules: mei_me
00:17.0 SATA controller: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: ahci
        Kernel modules: ahci
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:1c.1 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #2 (rev f1)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #5 (rev f1)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #9 (rev f1)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
00:1f.3 Audio device: Intel Corporation CM238 HD Audio Controller (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: i801_smbus
        Kernel modules: i2c_i801
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-LM (rev 31)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: e1000e
        Kernel modules: e1000e
01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro M1200 Mobile] (rev a2)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: nouveau
        Kernel modules: nouveau
02:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
        Subsystem: Intel Corporation Device 1010
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
        Subsystem: Hewlett-Packard Company Device 826b
        Kernel driver in use: rtsx_pci
        Kernel modules: rtsx_pci
6f:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 (rev 01)
        Subsystem: Samsung Electronics Co Ltd Device a801
        Kernel driver in use: nvme
        Kernel modules: nvme
-------- END -----------

-------- BEGIN OUTPUT COMMAND "/usr/lib64/qt5/bin/qdbus org.kde.KWin /KWin supportInformation" ---------
KWin Support Information:
The following information should be used when requesting support on e.g. http://forum.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 http://paste.kde.org instead of pasting into support threads.

==========================

Version
=======
KWin version: 5.8.7
Qt Version: 5.6.2
Qt compile version: 5.6.2
XCB compile version: 1.11.1

Operation Mode: X11 only

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_INPUT: yes
HAVE_DRM: yes
HAVE_GBM: no
HAVE_X11_XCB: yes
HAVE_EPOXY_GLX: yes
HAVE_WAYLAND_EGL: no

X11
===
Vendor: The X.Org Foundation
Vendor Release: 11803000
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.kwin.aurorae
Theme: __aurorae__svg__BlackSquare
Blur: 1
onAllDesktopsAvailable: true
alphaChannelSupported: true
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 0, 2
decorationButtonsRight: 6, 3, 4, 5
borderSize: 0
gridUnit: 10
font: Noto Sans,10,-1,0,50,0,0,0,0,0
smallSpacing: 2
largeSpacing: 10

Options
=======
focusPolicy: 1
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 750
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: true
focusStealingPreventionLevel: 1
legacyFullscreenSupport: false
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 30
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 30
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 31
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
showGeometryTip: false
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: true
inactiveTabsSkipTaskbar: false
autogroupSimilarWindows: false
autogroupInForeground: true
compositingMode: 1
useCompositing: true
compositingInitialized: true
hiddenPreviews: 1
glSmoothScale: 2
colorCorrected: false
xrenderSmoothScale: false
maxFpsInterval: 16666666
refreshRate: 0
vBlankTime: 6000000
glStrictBinding: true
glStrictBindingFollowsDriver: true
glCoreProfile: true
glPreferBufferSwap: 101
glPlatformInterface: 1
windowsBlockCompositing: true

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

Screens
=======
Multi-Head: no
Active screen follows mouse:  yes
Number of Screens: 2

Screen 0:
---------
Name: eDP-1
Geometry: 0,0,1920x1080
Refresh Rate: 60.0204

Screen 1:
---------
Name: DP-3
Geometry: 1920,0,1920x1200
Refresh Rate: 60.0204


Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Kabylake GT2 
OpenGL version string: 4.5 (Core Profile) Mesa 17.0.5
OpenGL platform interface: GLX
OpenGL shading language version string: 4.50
Driver: Intel
GPU class: Unknown
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 17.0.5
X server version: 1.18.3
Linux kernel version: 4.4.155
Direct rendering: Requires strict binding: yes
GLSL shaders:  yes
Texture NPOT support:  yes
Virtual Machine:  no
OpenGL 2 Shaders are used
Painting blocks for vertical retrace:  no

Loaded Effects:
---------------
zoom
mousemark
slidingpopups
kwin4_effect_login
wobblywindows
slide
screenshot
kwin4_effect_windowaperture
kwin4_effect_translucency
magiclamp
glide
desktopgrid
coverswitch
kwin4_effect_morphingpopups
kwin4_effect_maximize
kwin4_effect_fade
presentwindows
highlightwindow
kwin4_effect_dialogparent
blur
contrast
startupfeedback
screenedge
kscreen

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

Effect Settings:
----------------
zoom:
zoomFactor: 1.2
mousePointer: 0
mouseTracking: 0
enableFocusTracking: false
followFocus: true
focusDelay: 350
moveFactor: 20
targetZoom: 1

mousemark:
width: 3
color: #ff0000

slidingpopups:
fadeInTime: 75
fadeOutTime: 125

kwin4_effect_login:

wobblywindows:
stiffness: 0.16
drag: 0.69999999999999996
moveFactor: 0.20000000000000001
xTesselation: 20
yTesselation: 20
minVelocity: 0
maxVelocity: 1000
stopVelocity: 0.5
minAcceleration: 0
maxAcceleration: 1000
stopAcceleration: 0.5
moveEffectEnabled: true
openEffectEnabled: false
closeEffectEnabled: false
moveWobble: true
resizeWobble: true

slide:

screenshot:

kwin4_effect_windowaperture:

kwin4_effect_translucency:

magiclamp:
animationDuration: 125

glide:
duration: 175
effect: 0
angle: -90

desktopgrid:
zoomDuration: 150
border: 10
desktopNameAlignment: 0
layoutMode: 0
customLayoutRows: 2
usePresentWindows: true

coverswitch:
animationDuration: 100
animateSwitch: true
animateStart: true
animateStop: true
reflection: true
windowTitle: true
zPosition: 900
primaryTabBox: false
secondaryTabBox: false

kwin4_effect_morphingpopups:

kwin4_effect_maximize:

kwin4_effect_fade:

presentwindows:
layoutMode: 0
showCaptions: true
showIcons: true
doNotCloseWindows: false
ignoreMinimized: false
accuracy: 20
fillGaps: true
fadeDuration: 75
showPanel: false
leftButtonWindow: 1
rightButtonWindow: 2
middleButtonWindow: 0
leftButtonDesktop: 2
middleButtonDesktop: 0
rightButtonDesktop: 0

highlightwindow:

kwin4_effect_dialogparent:

blur:
blurRadius: 12
cacheTexture: true

contrast:

startupfeedback:
type: 1

screenedge:

kscreen:

-------- END -----------
Comment 2 Vlad Zahorodnii 2018-11-03 20:08:22 UTC 

*** This bug has been marked as a duplicate of bug 364709 ***