Hello, For some hardware devices (for instance the ThinkPad EC) the volume can be changed by (only) hardware buttons. Changes in the the hardware mixers are notified in the driver via the function "snd_ctl_notify" with the mask SNDRV_CLT_EVENT_MASK_VALUE. For notification of volume changes to the users of the system, an OSD can be used. To implement such a OSD, it must be possible to respond to changes done by the hardware. This raises the following question: is it possible to detect the events originating from the hardware in the functions that handle the callbacks (set via snd_mixer_elem_set_callback/snd_hctl_elem_set_callback)? This would allow to implement an OSD that only responds to the hardware buttons and that would ignore events originating from "software". Thanks _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
