Gentoo Archives: gentoo-user

From: Mick <michaelkintzios@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Still haveing problems with audio and guvcview
Date: Sat, 04 Jun 2011 19:15:01
Message-Id: 201106042013.51333.michaelkintzios@gmail.com
In Reply to: Re: [gentoo-user] Still haveing problems with audio and guvcview by meino.cramer@gmx.de
1 On Saturday 04 Jun 2011 12:42:07 meino.cramer@×××.de wrote:
2
3 > I modularized alsa.
4 > Now I have back my distorted sound when using vlc for tv and mplayer
5 > does not find any audio device despite the fact that everything is
6 > in place...and gucview produces videos with an empty audio track
7 > (recorded "sound of silence" as it seems) as it has done already
8 > before.
9 >
10 > What next?
11 [snip ...]
12
13 > !!USB Mixer information
14 > !!---------------------------
15 > --startcollapse--
16 >
17 > USB Mixer: usb_id=0x14152000, ctrlif=1, ctlerr=0
18 > Card: OmniVision Technologies, Inc. USB Camera-B4.04.27.1 at
19 > usb-0000:00:12.2-3, high Unit: 3
20 > Control: name="Mic Capture Volume", index=0
21
22 Hmmm .. shouldn't this line also have device=0 at the end?
23
24
25 > Info: id=3, control=2, cmask=0xf, channels=4, type="S16"
26 > Volume: min=0, max=1, dBmin=0, dBmax=0
27 > --endcollapse--
28 [snip ...]
29
30
31 > !!-------Mixer controls for card 0 [CameraB404271]
32 >
33 > amixer: Mixer load hw:0 error: Invalid argument
34 > Card hw:0 'CameraB404271'/'OmniVision Technologies, Inc. USB
35 > Camera-B4.04.27.1 at usb-0000:00:12.2-3, high' Mixer name : 'USB Mixer'
36 > Components : 'USB1415:2000'
37 > Controls : 1
38 > amixer: Mixer hw:0 load error: Invalid argument
39
40 That dreaded error again ...
41
42 What do you get when you run:
43
44 alsamixer -D hw:0
45
46
47 > Simple mixer control 'IEC958',0
48 > Capabilities: pswitch pswitch-joined penum
49 > Playback channels: Mono
50 > Mono: Playback [on]
51
52 Try muting this just in case it makes a difference (I seem to recall it used
53 to cause problems many moons ago).
54
55
56 > !!Alsactl output
57 > !!-------------
58 >
59 > --startcollapse--
60 > --endcollapse--
61
62
63 Hold on! Have you run alsactl at all?
64
65 Can you please run:
66
67 alsactl -d init
68
69 to load the modules, probe the cards and reset all your devices. Then run
70 alsamixer to adjust their settings accordingly.
71
72 If all this does not help, then all I can think is that something in the sound
73 drivers has changed for the worse (regression bug) and that's why you lost
74 your sound.
75 --
76 Regards,
77 Mick

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