https://bugzilla.kernel.org/show_bug.cgi?id=41042
Aaron Lu <aaron...@intel.com> changed:
What |Removed |Added
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CC| |aaron...@intel.com
--- Comment #9 from Aaron Lu <aaron...@intel.com> 2013-03-15 07:50:56 ---
(In reply to comment #5)
> I have some questions:
>
> 1) Are there any documentation describing the protocol used in
> the section "Sequence to change brightness" in Comment #2 ?
Perhaps yes, but we can't get it...
> Is it Dell specific? Chipset?
Code in DSDT table are generally provided by chipset vendor, but this is not a
sure thing.
> 2) What is the "hardware" implementing the acpi?
> Is it a microcontroller with firmware?
> Are there any documentation?
The only public documentation is the ACPI spec, where you can see descriptions
for _BCM, _BQC, etc. I believe you have already read them and know what they
are supposed to do. Well regarding what the asl code in _BCM and _BQC does, it
is totally a mystery to me. And if it doesn't work, we can probably only say,
this BIOS table is broken.
> Is it Dell specific? Chipset?
PS, do you have any problem during your normal use?
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