[ltp] hotkey_mask on t40 with thinkpad-acpi 0.18-20071013

[Henrique de Moraes Holschuh]

On Tue, 06 Nov 2007, Jan Taegert wrote:
> > If it is for on-screen-display purposes, well, the proper solution for that
> > one is not on the kernel yet.  The improper solution is to use 0x00ffffff
> > for the mask and a HAL config that knows that volume up/down/mute and
> > brightness up/down from a T40 thinkpad are to be used only for
> > on-screen-display.
> 
> You're right, actually I need it only to link the volume buttons to
> alsamixer/gnome-volume-control. As far as I know the signal from the

You cannot do that in a way that will work right now.  You would control the
volume output twice (unless you are using the output of a dock or extender,
which is not subject to the internal thinkpad mixer), but that reduces the
number of levels in half and can cause some nastiness...

I recommend mapping a different set of keys to use as volume up/down/mute
for the AC97 or HDA mixers.  You certainly have a lot of them available in
the T40 :-)

> thinkpad-acpi module (or one of those nice cpu-wakeup daemons ) is the
> only way to get this working. Maybe you know any better solution.

It is "Don't Do It" on anything older than a T61 or R61. And those do it
without going through thinkpad-acpi anyway, so it is always "Don't Do It".

Unless you hack the ACPI DSDT table, to have your thinkpad work differently
from the rest, that is.

> So I will leave it now as it is as it just works (even though I don't
> know exactly why ;) ). Interestingly I must have the hal config you
> mentioned above: With thinkpad-keys, one of these nvram polling daemons,
> gnome-power-manager turns completely unusable, maybe because pressing
> the brightness keys adjusts the backlight two times: one through the
> bios, a second from gpm itself. However, with hotkey_all_mask set it
> gives me on-screen-feedback and works how it's supposed to do.

Are you using Ubuntu?

-- 
  "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