[ltp] Notice to all Lenovo ThinkPad users for kernel 2.6.23+

[Henrique de Moraes Holschuh]

To all Lenovo ThinkPad users, using Linux kernels 2.6.23 or later:

If you have any of the newer BIOSes, you probably *have* to add the
following kernel parameter to the bootloader, so as to get the ThinkPad
firmware to behave:

acpi_osi="Linux"

Kernels 2.6.22 and previous always defined that osi string. 2.6.23 and later
don't (for now, at least).

It should at the very least fix the X61/T61 problems with the "mute" key.
Maybe others, too.

If anyone observed weirdness on their ThinkPads (Lenovo or IBM) when going
to 2.6.23 or later, I recommend also trying the acpi_osi="Linux" parameter.

This is a temporary solution, I will send another notice when a better one
becomes available.

-- 
  "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