I tried to find a way for switching/control Mute LED on an HP DV 7 notebook. I found a solution which is very ugly. According the solution described here (http://mailman.alsa-project.org/pipermail/alsa-devel/2009-April/016126.html) I changed the value for LED control in this manner:
diff -u alsa-driver-1.0.23/sound/pci/hda/patch_sigmatel.c alsa-driver-1.0.23_b/sound/pci/hda/patch_sigmatel.c --- alsa-driver-1.0.23/sound/pci/hda/patch_sigmatel.c 2010-04-16 13:10:10.000000000 +0200 +++ alsa-driver-1.0.23_b/sound/pci/hda/patch_sigmatel.c 2010-05-01 21:37:36.719063655 +0200 @@ -4952,9 +4952,9 @@ } } if (muted) - spec->gpio_data &= ~spec->gpio_led; /* orange */ + spec->gpio_data &= ~0x01; /* orange */ else - spec->gpio_data |= spec->gpio_led; /* white */ + spec->gpio_data |= 0x01; /* white */
if (!spec->gpio_led_polarity) { /* LED state is inverted on these systems */
I hate this solution. Maybe someone of the programming experts could give me a way to make it better. On which position should I make which changes ?
Thanx for your guidance.
Thoralf