OK. Works fine in Debian unstable (XFCE), so it is an Ubuntu problem.
The dependency differences in the QT/X11 area seem to be:
libqt5.........stuff: 5.5.1+dfsg-14 (Debian) > 5.5.1+dfsg-13ubuntu3 (Ubuntu)
libqt5x11extras5: 5.5.1-3 (Debian) > 5.5.1-3build1(Ubuntu)
libx11-6: 2:1.6.3-1 (Debian) > 2:1.6.3-1ubuntu2 (Ubuntu)
The plan was to drop back to QT4 for 16.04, and investigate it further for the next cycle. But if we can track it down to an Ubuntu patch, or dependency.........
OK. Works fine in Debian unstable (XFCE), so it is an Ubuntu problem.
The dependency differences in the QT/X11 area seem to be: ....... .stuff: 5.5.1+dfsg-14 (Debian) > 5.5.1+dfsg- 13ubuntu3 (Ubuntu) Ubuntu)
libqt5.
libqt5x11extras5: 5.5.1-3 (Debian) > 5.5.1-3build1(
libx11-6: 2:1.6.3-1 (Debian) > 2:1.6.3-1ubuntu2 (Ubuntu)
The plan was to drop back to QT4 for 16.04, and investigate it further for the next cycle. But if we can track it down to an Ubuntu patch, or dependency.........