The window manager keeps crashing and I need to restart it using kwin --replace & STEPS TO REPRODUCE It doesn't happen every time, but when it happens I'm usually switching between virtual deskops. I also have several workspaces set up, but I've been staying on one of them. OBSERVED RESULT The window decorations disappear, and doesn't come back until I run kwin --replace & Sometimes keyboard input disappears. EXPECTED RESULT SOFTWARE VERSIONS (available in About System) KDE Plasma Version: 5.12.6 KDE Frameworks Version: 5.44.0 Qt Version: 5.9.5 I'm using kubuntu 18.04 fully updated as of now. ADDITIONAL INFORMATION output from kwin: user@host:/var$ kwin --replace & [2] 8298 user@host:/var$ QXcbConnection: XCB error: 3 (BadWindow), sequence: 181, resource id: 119537670, major code: 20 (GetProperty), minor code: 0 QPainter::begin: Paint device returned engine == 0, type: 3 QPainter::setRenderHint: Painter must be active to set rendering hints QPainter::setWindow: Painter not active QPainter::setClipRect: Painter not active QPainter::save: Painter not active QPainter::setRenderHint: Painter must be active to set rendering hints QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::setClipRect: Painter not active QPainter::drawRects: Painter not active QPainter::restore: Unbalanced save/restore QPainter::save: Painter not active QPainter::setRenderHint: Painter must be active to set rendering hints QPainter::setBrush: Painter not active QPainter::setPen: Painter not active QPainter::drawRects: Painter not active QPainter::restore: Unbalanced save/restore OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GTX 970/PCIe/SSE2 OpenGL version string: 4.6.0 NVIDIA 390.87 OpenGL shading language version string: 4.60 NVIDIA Driver: NVIDIA Driver version: 390.87 GPU class: Unknown OpenGL version: 4.6 GLSL version: 4.60 X server version: 1.19.6 Linux kernel version: 4.15 Requires strict binding: no GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no kf5.kcoreaddons.desktopparser: Property type "Url" is not a known QVariant type. Found while parsing property definition for "X-KWin-Video-Url" in "/usr/share/kservicetypes5/kwineffect.desktop" QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2926, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2936, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2937, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2938, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2939, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2940, resource id: 0, major code: 14 (GetGeometry), minor code: 0 QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2942, resource id: 0, major code: 14 (GetGeometry), minor code: 0
The programs I were actively using at the time were emacs, blender, firefox and konsole.
Please install debug packages and submit a backtrace (you can get the backtrace by clicking on the sad face in the system tray). My guess is that's because of makeSubQuad.
I'm trying to figure out which packages to install, https://wiki.kubuntu.org/Kubuntu/Bugs/Reporting seems to be outdated.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!