[ltp] thinkpad-acpi release for 2.6.24-rc2

[Henrique de Moraes Holschuh]

On Tue, 20 Nov 2007, Yves-Alexis Perez wrote:
> my wm) but I guess I can live with that. But video.c have support for
> only backlights from like 10% to 100% and doesn't shut down the screen.

Thinkpad-acpi can't shut down the screen, either.  If I ever find out how to
do it in a portable way, you bet I will.  But so far, the only thing that
works right is the DPMS calls, and *that* is something I am not doing, ever.
Leave it for the X server and console blanking code.

> (and 100% in video.c is brighter than in thinkpad-acpi...)

That should not happen in thinkpad-acpi 0.18 (where you have 16-level
support for brightness).  But that does mean the highest level is 15 on some
thinkpads, and not just 7 :p

The real difference is that thinkpad-acpi uses direct hardware levels (which
are NOT linear changes in brightness), while Lenovo did a nice thing and
hardcoded a translation function for the ACPI DSDT, which supposedly lets
you talk to it in terms of brightness levels (so 50% really is "midway
bright" for ACPI video.c).

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh