<html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> <blockquote cite="mid:CAN8cciaMdn3GXhU5x8qWLkbM=M2=vz=Lpfid23sHDaeXU6+b9Q@mail.gmail.com" type="cite"> tatic int element_set_switch(pa_alsa_element *e, snd_mixer_t *m, bool b) { snd_mixer_elem_t *me; snd_mixer_selem_id_t *sid; int r; pa_assert(m); pa_assert(e); SELEM_INIT(sid, e->alsa_name); if (!(me = snd_mixer_find_selem(m, sid))) { pa_log_warn("Element %s seems to have disappeared.", e->alsa_name); return -1; } if (e->direction == PA_ALSA_DIRECTION_OUTPUT) r = snd_mixer_selem_set_playback_switch_all(me, b); else r = snd_mixer_selem_set_capture_switch_all(me, b); if (r < 0) pa_log_warn("Failed to set switch of %s: %s", e->alsa_name, pa_alsa_strerror(errno)); + else + pa_log_dbg("element_set_switch %s dir=%d index=%d ", e->alsa_name, e->direction, b); return r; } </blockquote> ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: Setting analog-input-microphone (analog-input-microphone) priority=0 ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: element_set_switch(): e->alsa_name Line ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: element_set_switch(): e->direction == PA_ALSA_DIRECTION_OUTPUT 28404576 ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: element_set_switch(): b 0 ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: element_set_switch(): me 28912288 ( 0.094| 0.000) D: [lt-pulseaudio] alsa-mixer.c: element_set_switch Line dir=2 index=0 However, Mic is selected in sound menu. <blockquote type="cite"> The pcm capture source seem changed to mic which is index 0 There are some difference between Capture Source of ac97 codec and PCM Capture Source of snd-usb-audio The source of Ac97 capture source are cswitch-exclusive , only one cswitch can be on and others are off Simple mixer control 'Line',0 Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive penum Capture exclusive group: 0 Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Front Left: Playback 0 [0%] [-34.50dB] [off] Capture [off] Front Right: Playback 0 [0%] [-34.50dB] [off] Capture [off] Simple mixer control 'Mic',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive penum Capture exclusive group: 0 Playback channels: Mono Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Playback 0 [0%] [-34.50dB] [off] Front Left: Capture [on] Front Right: Capture [on] static int element_set_volume(pa_alsa_element *e, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v, bool deferred_volume, bool write_to_hw) { ... } else { - if ((r = snd_mixer_selem_set_capture_dB(me, c, value, rounding)) >= 0) + if ((r = snd_mixer_selem_set_capture_dB(me, c, value, rounding)) >= 0) { + pa_log_debug("element_set_volume %s %d dB", e->alsa_name, value); r = snd_mixer_selem_get_capture_dB(me, c, &value); + } } </blockquote> According to log output element_set_volume() is never called at start, only when opening sound UI. But it goes to other if branch, because of write_to_hw being false. Here is fresh log of first run after restart: <a class="moz-txt-link-freetext" href="http://pastebin.com/GJyUiraP">http://pastebin.com/GJyUiraP</a> Mic was initially selected in UI, but didn't work, then I switched to Line and back. <meta http-equiv="content-type" content="text/html; charset=utf-8"> <pre class="moz-signature" cols="72">Sincerely, Nazar Mokrynskyi github.com/nazar-pc Skype: nazar-pc Diaspora: <a class="moz-txt-link-abbreviated" href="mailto:nazarpc@diaspora.mokrynskyi.com">nazarpc@diaspora.mokrynskyi.com</a> Tox: A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249</pre> </body> </html>