[ltp] WARNING: Lenovo ThinkPads and 65W power supplies

[Henrique de Moraes Holschuh]

On Sun, 07 Nov 2010, Fabian Henze wrote:
> On Sun, 07 Nov 2010, 01:30:15-UTC Henrique de Moraes Holschuh wrote:
> > Look in your DSDT for a suspicious bit in the EmbeddedController namespace,
> > that has 65 or 90 as part of its 4-char name.
> > 
> > If it is there and the DSDT or a XSDT refers to it in some code, you have
> > your answer.
> 
> But it won't cut the performance, if I use a 90W psu (even though my T510 came 

The ThinkPad is engineered to take full advantage of the extra power budget
from a 90W AC supply.  It will not try to limit the cpu frequency when you
remove the battery with a 90W adapter (it can still limit it for *other*
reasons, though).

> with a 65W one) and/or always use a battery? So there is no gain in patching 
> the DSDT or XSDT for my setup?

Patching the DSDT or XSDT of your thinkpad with random crap found in the
Internet is not anywhere close to a safe idea.

If you have strong reason to think you need a DSDT/XSDT patch, I recommedn
that you post it here *AND* in the linux-acpi ML first, with details of why
you think you need it, and where you found it...

-- 
  "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