[alsa-devel] Mic Boost control problem with snd-hda-intel codec AL662 rev 1
Hi,
The Mic Boost control on a laptop seems to behave incorrectly. The control has the flag "volume" instead of "cvolume", causing it to appear in both the "Playback" and "Capture" tabs of alsamixer. This wouldn't be a problem if it would just work in the Capture tab: it doesn't. When I modify it in Capture, it doesn't retain its value: it's gone after i close alsamixer. But if i modify it in "Playback" it will retain its value and the value will be mirrored by the Mic Boost in Capture (both Mic Boost seem to reflect the same control, except one is RO, the other is RW).
It's a minor a annoyance, but I'd like to fix it and have "Mic Boost" appear only as a Capture control and retaining its value. Maybe I should create a new mixer configuration for this hardware in patch_realtek.c, but I don't know where to start. Bios autoprobing works for everything but just what I mentioned.
My alsa-info.sh : http://www.alsa-project.org/db/?f=fc17b509e532fc366eb2d5fe5ec9e6730c96c837
Any ideas? Where should I start?
Regards,
Anisse
At Wed, 6 Jan 2010 16:43:38 +0100, Anisse Astier wrote:
Hi,
The Mic Boost control on a laptop seems to behave incorrectly. The control has the flag "volume" instead of "cvolume", causing it to appear in both the "Playback" and "Capture" tabs of alsamixer. This wouldn't be a problem if it would just work in the Capture tab: it doesn't. When I modify it in Capture, it doesn't retain its value: it's gone after i close alsamixer. But if i modify it in "Playback" it will retain its value and the value will be mirrored by the Mic Boost in Capture (both Mic Boost seem to reflect the same control, except one is RO, the other is RW).
It's a minor a annoyance, but I'd like to fix it and have "Mic Boost" appear only as a Capture control and retaining its value. Maybe I should create a new mixer configuration for this hardware in patch_realtek.c, but I don't know where to start. Bios autoprobing works for everything but just what I mentioned.
Well, Mic Boost is applied to both playback and capture in case you have analog loopback. So, it's not entirely wrong.
The problem is rather the inconsistent behavior in alsamixer. I guess it's a bug of old alsa-lib. Try to upgrade the alsa-lib and alsa-utils first.
Takashi
On Tue, 12 Jan 2010 12:43:13 +0100, Takashi Iwai tiwai@suse.de wrote :
At Wed, 6 Jan 2010 16:43:38 +0100, Anisse Astier wrote:
Hi,
The Mic Boost control on a laptop seems to behave incorrectly. The control has the flag "volume" instead of "cvolume", causing it to appear in both the "Playback" and "Capture" tabs of alsamixer. This wouldn't be a problem if it would just work in the Capture tab: it doesn't. When I modify it in Capture, it doesn't retain its value: it's gone after i close alsamixer. But if i modify it in "Playback" it will retain its value and the value will be mirrored by the Mic Boost in Capture (both Mic Boost seem to reflect the same control, except one is RO, the other is RW).
It's a minor a annoyance, but I'd like to fix it and have "Mic Boost" appear only as a Capture control and retaining its value. Maybe I should create a new mixer configuration for this hardware in patch_realtek.c, but I don't know where to start. Bios autoprobing works for everything but just what I mentioned.
Well, Mic Boost is applied to both playback and capture in case you have analog loopback. So, it's not entirely wrong.
The problem is rather the inconsistent behavior in alsamixer. I guess it's a bug of old alsa-lib. Try to upgrade the alsa-lib and alsa-utils first.
You were right, problem goes away after upgrading userland lib and utils.
Thanks!
Anisse
participants (2)
-
Anisse Astier -
Takashi Iwai