At what point the actual switch from the old driver to the new one occurs?
Is it on the next reboot or at some other point of time?
If something will go wrong and I'll get reboot ending with stuck GUI,
how to back out of it into something that works?
I understand that editing "/etc/inittab" and changing "runlevel"
to single ("1" on my desktop PC, haven't looked yet what's in the laptop)
results in text mode operation, what files related to video should I
preserve before the driver update to be able to restore the previous
operation if something goes wrong?