Re: Bug on ibm-acpi and hal regarding brightness keys

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On Tue, 03 Jul 2007, Henrique de Moraes Holschuh wrote:
> On Tue, 03 Jul 2007, Alfredo Matos wrote:
> > > Is it EC register 0x31?
> > 
> > Done. It's 0xa0 from what i can see. 
> 
> Ok.  This is the first EC incompatibility fallout from the Lenovo move,
> then.
> 
> Time to hunt down this in ACPI ECOR space.  If it is not there, it will be
> bad.  We can always *try* to use the CMOS nvram instead, maybe that will
> work better across all thinkpads.

Well, I have looked at the dumps and the DSDT.  The ECOR node is HBRV (H8
brightness), and it is still at EC 0x31, so the T60 and X60 should still
work with the ibm-acpi old brightness code.

Also, whatever EC 0xA0 is, it does *not* look like the brightness register,
at all.

What does "echo 0x31 N" > /proc/acpi/ibm/ecdump (where N is a number from 0
to 7) do in your thinkpad?  Does a cat /proc/acpi/ibm/ecdump show that the
value changed as expected?

If the above command changes the brightness, then there is something
*really* fishy going on.

-- 
  "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

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