Bug#926920: With non-free nvidia-driver solved GDM and GNOME performance problems.

[hoxp18 <hoxp18@noramail.jp>]

Dear maintainers,

I install non-free nvidia-driver package,
and now everything seems fine.

GDM launch is fine.
GNOME session is smooth.
Firefox is okay, I can watch youtube frustration-free,
of course full screen is also okay.

uswsusp works, too. suspend-to-RAM and resume works.
I enabled C1E and C8, all the C state at BIOS.

The syslog size is about 200KB.
Please tell me if you want it. I keep them.

Regards.