Comment 105 for bug 1510344

The mentioned workaround fix the problem on my Dell Precision 7510. And more important it also fixes a assumed random crash after suspend/resume. It comes out that the xsession creashes when I suspend on docking station, then remove the laptop from docking station, resume and switch off keyboard backlight, go to suspend again and finally resume on docking station. Take a bit to get this combination ;)