[André Hänsel Do 29. April 2010]: > I have another similar question. I found out (HAL told me) that the > headphones button is /dev/input/event4 and that a message gets sent when it > is pressed referring to > /org/freedesktop/Hal/devices/computer_logicaldev_input_1. However when I > read from /dev/input/event4 I only get data when a phone call is in > progress. So I guess it needs to be enabled in a similar way as the > accelerometer does? The headset pushbutton needs MICBIAS voltage to work. This voltage probably is enabled only if the mic audiodevice is in use for input, maybe alsamixer has a control for it, or there might be a sysnode to switch MICBIAS on/off. /joerg
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