[ltp] X61 Brightness Question

Jeremy L. Moles linux-thinkpad@linux-thinkpad.org
Tue, 14 Aug 2007 09:52:28 -0400


On Mon, 2007-08-13 at 19:38 -0300, Henrique de Moraes Holschuh wrote:
> On Mon, 13 Aug 2007, Jeremy L. Moles wrote:
> > In 0.14 thinkpad-acpi I used /proc/acpi/event to watch for chatter
> > relating to the keypress. In 0.15 I used a small utility to monitor the
> > evdev device node (/dev/input/event5 in our case) to monitor any noise.
> > In both cases, only brightness UP did anything.
> 
> That would mean Lenovo broke the ACPI DSDT/SSDT.  Complain to them if that's
> the case (but see below, first).
> 
> > the kernel takes over, naturally). Our hotkey knob in proc is enabled
> > and uses a 0xFFFF mask.
> 
> Use 0xffffff on 0.15.  That just might fix the issue. Did it?

Yes indeed. :) Many thanks...

> -- 
>   "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