Re: [PATCH v3 1/2] acpi: Add "acpi_osi=" for ASUS X200MA to enable, brightness keys

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NAK on addoing this acpi_osi= quirk to upstream Linux.

The reason is that problem is being actively debugged.
Quirks in upstream Linux are for when we give up.

Sure, it is perfectly okay for individual users to invoke it.
It is even fine for a distro to check in this workaround if they care
about that box working *now*
and they are not concerned about side effects.

But the real fix is in development, and checking workarounds with
possible other side-effects
into up-stream Linux is just a distraction from getting it right for
not just this machine,
but other machines w/ the same issue.

thanks,
Len Brown, Intel Open Source Technology Center

ps. lots of people are mis-using acpi_osi= in debugging, please consult
Documentation/kernel-parameters.txt for a detailed description of how
this cmdline option works.  Note, in particular, that acpi_osi=XYZ by itself
will _add_ XYZ to the list of recognized strings.  If that string is
already built
into Linux (eg. "Windows 2012"), then adding it again has no effect.
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