Re: patch for video.c driver

Len Brown
2009-03-14T07:55:18Z

Terence,

First, I'm delighted to hear from nvidia -- thanks
for reaching out to the Linux community.

a couple of observations...

drivers/acpi/*.c in general, and video.c in particular,
are meant to implement what is documented in the ACPI specification.

Linux has moved the vendor specific drivers (that may use ACPI,
or use vendor-specific ACPI extensions)
to drivers/platform/x86/*.c

That is where I'd generally expect an nvidia-specific ACPI extension to
live.

Is there any public documentationon how NVIF is supposed to operate?

I have a new snappy Sony laptop that has both nvidia and intel graphics,
and it has an NVIF. I'm certain that Linux has no idea how to
switch between "Stamina" and "Speed" modes...

But I also have a Lenovo T61 with only Intel graphics,
and it still has an NVIF. (presumably Lenovo ships one
BIOS for both their Intel and Nvidia based T61's...)
What happens with NVIF in this case?

thanks,
-Len