On Friday, February 24, 2012 02:27:06 PM Chase Douglas wrote: > On 02/24/2012 01:31 PM, Dmitry Torokhov wrote: > > On Friday, February 24, 2012 12:04:04 PM Randy Dunlap wrote: > >> (b) My Toshiba Portege laptop has a touchpad on/off button. Is that > >> supported? > > > > Kernel probably emits one of KEY_TOUCHPAD_* for it; whether it is > > handled > > in userspace I do not know. > > I have heard from some of our engineers who have looked into this that > the interface for these buttons is not standardized. Sometimes the > buttons turn off the touchpad in hardware. Sometimes they emit events > that tell the OS to turn it off, and the OS needs to know how to handle it. > > On top of that, LEDs are sometimes there to tell you if the trackpad is > on or off. These are also not standardized. Sometimes they are hooked up > to the hardware, and when the hardware is off they go off. Sometimes > they are just a plain old LED and the OS needs to turn it on and off. > > Fun... That's because hardware designers were so delighted in beauty that is rfkill buttons, they just had to do the same with touchpads... -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
