On Fri, 2007-06-15 at 01:06 -0300, Henrique de Moraes Holschuh wrote: > On Tue, 29 May 2007, Matthew Garrett wrote: > > On Mon, May 28, 2007 at 11:58:24PM +0100, Richard Hughes wrote: > > > I've been hacking to make the nvram hardware buttons on thinkpad exposed > > > as a hardware mixer device. This requires the nvram to be polled in > > > kernel space, and then examined to see if the volume and mute status has > > > changed. I have attached code to export a simple mono tuner, but this > > > needs further testing and integration. I've also prepared a preliminary > > > patch to add the polling to the thinkpad_acpi driver. > > > > The recent Thinkpads I've played with have all triggered interrupts on > > IRQ 9 when hitting the nvram hotkeys. ACPI registers this as a shared > > interrupt, so possibly there's some hope of being able to hook in there? > > I'm not sure if this is the case on all machines, so it might require a > > table for polling/non-polling behaviour. > > Err... not only we CAN get them using interrupts, it was already sort of > working(!). Try an echo 0xffffffff > /proc/acpi/ibm/hotkeys, and watch the > weird ACPI events it generates when you press the volume keys, etc.
Ohh wow. Good catch. I only ever played with low bytes of hotkeys, I never tried FFFFFFFF! > I have a patch that fixes and documents the whole stuff almost ready, it > will be pushed to the git tree soon. So, we still use a hardware mixer? That still makes most sense from my point of view as the events are still hardware. > BTW, I also got events for the LID switch on the same code path in a T43, > now. I will be adding EV_SW to thinkpad-acpi soon :p Okay cool. Could you give me a sneak peek at the patch, so I can try it on my x60? Thanks, Richard. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
