Re: acpi on r40e

[Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On Sat, 2004-02-07 at 11:20, Praveen C wrote:

> Another problem with acpi which I forgot to mention is that it makes
> the special buttons for volume and brightness control ineffective. If I
> boot the same kernel with acpi=off those buttons work fine.

Interesting.
If you boot, say with "acpi=off", your volume and brightness buttons
work, but if you boot with ACPI enabled they have no effect?

you DSDT has an IBM defined device:

                    Device (HKEY)
                    {
                        Name (_HID, EisaId ("IBM0068"))

which sure sounds like it might be a hot-key device;-)
However, not immediately clear to me how ACPI w/o vendor-specific
extensions would talk to it.  Even more unclear is how and why these
buttons work when ACPI is disabled, and how ACPI interferes with their
proper operation when it is enabled.

-Len




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