/etc/X11/Xsession.d/90qt5-opengl is in libqt5gui5 5.7.1+dfsg-3+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | # -*- sh -*-
# Xsession.d script to set the QT_XCB_FORCE_SOFTWARE_OPENGL env variable when
# the user does not has at least OpenGL 2 support.
#
# This file is sourced by Xsession(5), not executed.
if [ "$(which glxinfo)" = "" ] ; then
echo "To detect whether software based rendering is needed for Qt 5 the glxinfo program is a requirement but it was not found on this system."
echo "On Debian (based) systems, install the mesa-utils package."
#echo "On RedHat (based) systems, install the glx-utils package."
else
OPENGL_VERSION=`LANG=C glxinfo | grep '^OpenGL version string: ' | head -n 1 | sed -e 's/^OpenGL version string: \([0-9]\).*$/\1/g'`
if [ -n "$OPENGL_VERSION" ] && [ "$OPENGL_VERSION" -lt 2 ]; then
QT_XCB_FORCE_SOFTWARE_OPENGL=1
export QT_XCB_FORCE_SOFTWARE_OPENGL
elif [ -n "$OPENGL_VERSION" ] ; then
echo "OpenGL version: $OPENGL_VERSION."
else
echo "OpenGL version not found."
fi
fi
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