Roderick Johnstone wrote: > By setting: > export QT_XCB_FORCE_SOFTWARE_OPENGL = 1 > export LIBGL_ALWAYS_SOFTWARE=1 It doesn't make sense to set both of these. QT_XCB_FORCE_SOFTWARE_OPENGL is the same as LIBGL_ALWAYS_SOFTWARE, but for Qt 5 applications only. Kevin Kofler