3d starts with forced SP
and fails with segfault in MP

qtdiag posted below

Qt 5.14.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 7.4.0) on "xcb"
OS: Ubuntu 18.04.4 LTS [linux version 4.15.0-88-generic]

Architecture: x86_64; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 RTM HLE

Environment:
QT_ACCESSIBILITY="1"
QT_PLATFORM_PLUGIN="lxqt"
QT_QPA_PLATFORMTHEME="lxqt"
QT_STYLE_OVERRIDE="gtk"

Features: QT_NO_EXCEPTIONS

Library info:
PrefixPath: /home/greg/MyQt5.14.2
DocumentationPath: /home/greg/MyQt5.14.2/doc
HeadersPath: /home/greg/MyQt5.14.2/include
LibrariesPath: /home/greg/MyQt5.14.2/lib
LibraryExecutablesPath: /home/greg/MyQt5.14.2/libexec
BinariesPath: /home/greg/MyQt5.14.2/bin
PluginsPath: /home/greg/MyQt5.14.2/plugins
ImportsPath: /home/greg/MyQt5.14.2/imports
Qml2ImportsPath: /home/greg/MyQt5.14.2/qml
ArchDataPath: /home/greg/MyQt5.14.2
DataPath: /home/greg/MyQt5.14.2
TranslationsPath: /home/greg/MyQt5.14.2/translations
ExamplesPath: /home/greg/MyQt5.14.2/examples
TestsPath: /home/greg/MyQt5.14.2/tests
SettingsPath: /home/greg/MyQt5.14.2/etc/xdg

Standard paths [*...* denote writable entry]:
DesktopLocation: "Desktop" /home/greg/Desktop
DocumentsLocation: "Documents" /home/greg/Documents
FontsLocation: "Fonts" /home/greg/.local/share/fonts /home/greg/.fonts /etc/xdg/lubuntu/fonts /usr/local/share/fonts /usr/share/fonts /usr/share/gdm/fonts /var/lib/menu-xdg/fonts /usr/share/Lubuntu/fonts
ApplicationsLocation: "Applications" /home/greg/.local/share/applications /etc/xdg/lubuntu/applications /usr/local/share/applications /usr/share/applications /usr/share/gdm/applications /var/lib/menu-xdg/applications /usr/share/Lubuntu/applications
MusicLocation: "Music" /home/greg/Music
MoviesLocation: "Movies" /home/greg/Videos
PicturesLocation: "Pictures" /home/greg/Pictures
TempLocation: "Temporary Directory" /tmp
HomeLocation: "Home" /home/greg
AppLocalDataLocation: "Application Data" /home/greg/.local/share/QtProject/qtdiag /etc/xdg/lubuntu/QtProject/qtdiag /usr/local/share/QtProject/qtdiag /usr/share/QtProject/qtdiag /usr/share/gdm/QtProject/qtdiag /var/lib/menu-xdg/QtProject/qtdiag /usr/share/Lubuntu/QtProject/qtdiag
CacheLocation: "Cache" /home/greg/.cache/QtProject/qtdiag
GenericDataLocation: "Shared Data" /home/greg/.local/share /etc/xdg/lubuntu /usr/local/share /usr/share /usr/share/gdm /var/lib/menu-xdg /usr/share/Lubuntu
RuntimeLocation: "Runtime" /run/user/1000
ConfigLocation: "Configuration" /home/greg/.config /etc/xdg/lubuntu /etc/xdg/xdg-Lubuntu /etc/xdg
DownloadLocation: "Download" /home/greg/Downloads
GenericCacheLocation: "Shared Cache" /home/greg/.cache
GenericConfigLocation: "Shared Configuration" /home/greg/.config /etc/xdg/lubuntu /etc/xdg/xdg-Lubuntu /etc/xdg
AppDataLocation: "Application Data" /home/greg/.local/share/QtProject/qtdiag /etc/xdg/lubuntu/QtProject/qtdiag /usr/local/share/QtProject/qtdiag /usr/share/QtProject/qtdiag /usr/share/gdm/QtProject/qtdiag /var/lib/menu-xdg/QtProject/qtdiag /usr/share/Lubuntu/QtProject/qtdiag
AppConfigLocation: "Application Configuration" /home/greg/.config/QtProject/qtdiag /etc/xdg/lubuntu/QtProject/qtdiag /etc/xdg/xdg-Lubuntu/QtProject/qtdiag /etc/xdg/QtProject/qtdiag

File selectors (increasing order of precedence):
en_US unix linux ubuntu

Network:
Using "OpenSSL 1.1.1 11 Sep 2018", version: 0x1010100f

Platform capabilities: ThreadedPixmaps OpenGL ThreadedOpenGL WindowMasks MultipleWindows ForeignWindows NonFullScreenWindows NativeWidgets WindowManagement SyncState RasterGLSurface SwitchableWidgetComposition

Style hints:
mouseDoubleClickInterval: 400
mousePressAndHoldInterval: 500
startDragDistance: 8
startDragTime: 500
startDragVelocity: 0
keyboardInputInterval: 400
keyboardAutoRepeatRate: 30
cursorFlashTime: 1200
showIsFullScreen: 0
showIsMaximized: 0
passwordMaskDelay: 0
passwordMaskCharacter: U+2022
fontSmoothingGamma: 1.7
useRtlExtensions: 0
setFocusOnTouchRelease: 0
tabFocusBehavior: Qt::TabFocusAllControls
singleClickActivation: 0

Additional style hints (QPlatformIntegration):
ReplayMousePressOutsidePopup: 0

Theme:
Platforms requested : gtk3,gnome,generic
available : gtk3,snap,flatpak,xdgdesktopportal
Styles requested : fusion,windows
available : Windows,Fusion
Icon theme : gnome, from /home/greg/.icons,/home/greg/.local/share/icons,/usr/share/icons
System font : "Ubuntu" 11
Native file dialog
Native color dialog
Native font dialog

Fonts:
General font : "Ubuntu" 11
Fixed font : "monospace" 11
Title font : "DejaVu Sans" 12
Smallest font: "DejaVu Sans" 12

Palette:
QPalette::WindowText: #ff000000
QPalette::Button: #ffefefef
QPalette::Light: #ffffffff
QPalette::Midlight: #ffcbcbcb
QPalette::Dark: #ff9f9f9f
QPalette::Mid: #ffb8b8b8
QPalette::Text: #ff000000
QPalette::BrightText: #ffffffff
QPalette::ButtonText: #ff000000
QPalette::Base: #ffffffff
QPalette::Window: #ffefefef
QPalette::Shadow: #ff767676
QPalette::Highlight: #ff308cc6
QPalette::HighlightedText: #ffffffff
QPalette::Link: #ff0000ff
QPalette::LinkVisited: #ffff00ff
QPalette::AlternateBase: #fff7f7f7
QPalette::NoRole: #ff000000
QPalette::ToolTipBase: #ffffffdc
QPalette::ToolTipText: #ff000000
QPalette::PlaceholderText: #80000000

Screens: 2, High DPI scaling: inactive

1. 0 "HDMI-1" Depth: 24 Primary: yes
   Manufacturer: Philips Consumer Electronics Company
   Model: PHL 223V5-
   Serial number: ZVC1448023716
   Geometry: 1920x1080+3440+0 Available: 1920x1080+3440+0
   Virtual geometry: 5360x1440+0+0 Available: 5360x1440+0+0
   2 virtual siblings
   Physical size: 477x268 mm Refresh: 60 Hz Power state: 0
   Physical DPI: 102.239,102.358 Logical DPI: 96.2829,96.2526 Subpixel_None
   DevicePixelRatio: 1 Pixel density: 1
   Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

1. 1 "DVI-D-1-1" Depth: 24 Primary: no
   Manufacturer: Dell Inc.
   Model: DELL U3415W-
   Serial number: F1T1W8410TLL-
   Geometry: 3440x1440+0+0 Available: 3440x1440+0+0
   Virtual geometry: 5360x1440+0+0 Available: 5360x1440+0+0
   2 virtual siblings
   Physical size: 798x335 mm Refresh: 49.9868 Hz Power state: 0
   Physical DPI: 109.494,109.182 Logical DPI: 96.2829,96.2526 Subpixel_None
   DevicePixelRatio: 1 Pixel density: 1
   Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

LibGL Vendor: Intel Open Source Technology Center
Renderer: Mesa DRI Intel(R) HD Graphics 630 (Kaby Lake GT2)
Version: 3.0 Mesa 19.2.8
Shading language: 1.30
Format: Version: 3.0 Profile: 0 Swap behavior: 0 Buffer size (RGB): 8,8,8
Profile: None (QOpenGLFunctions_3_0)