I have the newer version of libgl1-mesa-dri and libglx-mesa0 and am still getting a blank login screen except for the boxes used to enter the username and password. I can enter the username and password carefully into the boxes, but, cannot see what I am typing. If I type them both correctly lxQT comes up and the OS runs fine. This is on my old Asus EEEpc that's been running siduction lxQT for many years.