* No sound with snd_cmipci
@ 2006-10-08 17:34 Pierre Ossman
2006-10-09 13:34 ` Takashi Iwai
0 siblings, 1 reply; 5+ messages in thread
From: Pierre Ossman @ 2006-10-08 17:34 UTC (permalink / raw)
To: alsa-devel
Hi!
I bought some cheap ass sound card yesterday to use in my HTPC system.
Unfortunately, I cannot seem to get it to output any sound.
The card is labeled "PC Line" but is a C-Media CM8738, i.e. snd_cmipci.
There are no error messages whatsoever, just no audio out.
The problem only seems to affect PCM as I did some tests with a mic that
worked just fine. The mixer controls for mic playback and capture both
work and I get valid data when recording. PCM eats data at a reasonable
pace, but no sound it sent out. Also, no data is generated when I set
capture to PCM and try to loop stuff.
I also notice two other effects, but I do not know if they're relevant.
First, the mixer setting "IEC958 In Monitor" cannot be turned off.
Second, when "IEC958 Output" is activated, mic playback is activated
unconditionally.
Any help appreciated.
Rgds
Pierre
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: No sound with snd_cmipci
2006-10-08 17:34 No sound with snd_cmipci Pierre Ossman
@ 2006-10-09 13:34 ` Takashi Iwai
2006-10-09 14:09 ` Pierre Ossman
0 siblings, 1 reply; 5+ messages in thread
From: Takashi Iwai @ 2006-10-09 13:34 UTC (permalink / raw)
To: Pierre Ossman; +Cc: alsa-devel
At Sun, 08 Oct 2006 19:34:29 +0200,
Pierre Ossman wrote:
>
> Hi!
>
> I bought some cheap ass sound card yesterday to use in my HTPC system.
> Unfortunately, I cannot seem to get it to output any sound.
>
> The card is labeled "PC Line" but is a C-Media CM8738, i.e. snd_cmipci.
> There are no error messages whatsoever, just no audio out.
>
> The problem only seems to affect PCM as I did some tests with a mic that
> worked just fine. The mixer controls for mic playback and capture both
> work and I get valid data when recording. PCM eats data at a reasonable
> pace, but no sound it sent out. Also, no data is generated when I set
> capture to PCM and try to loop stuff.
>
> I also notice two other effects, but I do not know if they're relevant.
> First, the mixer setting "IEC958 In Monitor" cannot be turned off.
> Second, when "IEC958 Output" is activated, mic playback is activated
> unconditionally.
It's weird. Possibly a new chip revision that is slightly
incompatible with the olders? Check /proc/asound/cards which revision
it has.
Anyway, please show the current mixer state (/etc/asound.state, or a
file generated via "alsactl -f somefile store"), and the register dump
of /proc/asound/card0/cmipci.
Takashi
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: No sound with snd_cmipci
2006-10-09 13:34 ` Takashi Iwai
@ 2006-10-09 14:09 ` Pierre Ossman
2006-10-09 14:21 ` Lee Revell
0 siblings, 1 reply; 5+ messages in thread
From: Pierre Ossman @ 2006-10-09 14:09 UTC (permalink / raw)
To: Takashi Iwai; +Cc: alsa-devel
[-- Attachment #1: Type: text/plain, Size: 979 bytes --]
Takashi Iwai wrote:
> It's weird. Possibly a new chip revision that is slightly
> incompatible with the olders? Check /proc/asound/cards which revision
> it has.
>
>
1 [CMI8738MC6 ]: CMI8738-MC6 - C-Media PCI CMI8738-MC6
C-Media PCI CMI8738-MC6 (model 55) at 0xe800, irq 11
> Anyway, please show the current mixer state (/etc/asound.state, or a
> file generated via "alsactl -f somefile store"), and the register dump
> of /proc/asound/card0/cmipci.
>
>
State file included.
Register dump:
[root@chronos ~]# cat /proc/asound/card1/cmipci
C-Media PCI CMI8738-MC6 (model 55) at 0xe800, irq 11
00: 00 00 00 00
04: 10 fc 00 00
08: 0f 00 09 00
0c: 00 00 00 0b
10: c0 00 00 00
14: 00 00 00 00
18: 00 80 80 0c
1c: c8 fe fe ff
20: 10 40 f9 00
24: ef 3e ff 00
28: ff ff ff ff
2c: ff ff ff ff
30: 00 00 00 00
34: 00 00 00 00
38: 00 00 00 00
3c: 00 00 00 00
Are there any specs available on this chip or is it all reverse engineered?
Rgds
Pierre
[-- Attachment #2: cmipci.state --]
[-- Type: text/plain, Size: 7851 bytes --]
state.CMI8738MC6 {
control.1 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 31'
iface MIXER
name 'Master Playback Volume'
value.0 20
value.1 20
}
control.2 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name '3D Control - Switch'
value true
}
control.3 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 31'
iface MIXER
name 'PCM Playback Volume'
value.0 31
value.1 31
}
control.4 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'PCM Playback Switch'
value false
}
control.5 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'PCM Capture Switch'
value.0 true
value.1 true
}
control.6 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 31'
iface MIXER
name 'Synth Playback Volume'
value.0 31
value.1 31
}
control.7 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Synth Playback Switch'
value false
}
control.8 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 4
iface MIXER
name 'Synth Capture Route'
value.0 false
value.1 false
value.2 false
value.3 false
}
control.9 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 31'
iface MIXER
name 'CD Playback Volume'
value.0 31
value.1 31
}
control.10 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'CD Playback Switch'
value.0 false
value.1 false
}
control.11 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 4
iface MIXER
name 'CD Capture Route'
value.0 false
value.1 false
value.2 false
value.3 false
}
control.12 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 31'
iface MIXER
name 'Line Playback Volume'
value.0 31
value.1 31
}
control.13 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Line Playback Switch'
value.0 false
value.1 false
}
control.14 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 4
iface MIXER
name 'Line Capture Route'
value.0 false
value.1 false
value.2 false
value.3 false
}
control.15 {
comment.access 'read write'
comment.type INTEGER
comment.count 1
comment.range '0 - 31'
iface MIXER
name 'Mic Playback Volume'
value 11
}
control.16 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Mic Playback Switch'
value true
}
control.17 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Mic Capture Switch'
value false
}
control.18 {
comment.access 'read write'
comment.type INTEGER
comment.count 1
comment.range '0 - 3'
iface MIXER
name 'PC Speaker Playback Volume'
value 3
}
control.19 {
comment.access 'read write'
comment.type INTEGER
comment.count 2
comment.range '0 - 15'
iface MIXER
name 'Aux Playback Volume'
value.0 15
value.1 15
}
control.20 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Aux Playback Switch'
value.0 true
value.1 true
}
control.21 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 2
iface MIXER
name 'Aux Capture Switch'
value.0 false
value.1 false
}
control.22 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Mic Boost Playback Switch'
value true
}
control.23 {
comment.access 'read write'
comment.type INTEGER
comment.count 1
comment.range '0 - 7'
iface MIXER
name 'Mic Capture Volume'
value 7
}
control.24 {
comment.access 'read write'
comment.type INTEGER
comment.count 1
comment.range '0 - 7'
iface MIXER
name 'Phone Playback Volume'
value 7
}
control.25 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Phone Playback Switch'
value true
}
control.26 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'PC Speaker Playnack Switch'
value true
}
control.27 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Mic Boost Capture Switch'
value true
}
control.28 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'Four Channel Mode'
value true
}
control.29 {
comment.access 'read write'
comment.type ENUMERATED
comment.count 1
comment.item.0 Line-In
comment.item.1 'Rear Output'
comment.item.2 'Bass Output'
iface MIXER
name 'Line-In Mode'
value 'Rear Output'
}
control.30 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 Output Switch'
value false
}
control.31 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 In Valid'
value false
}
control.32 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 Copyright'
value false
}
control.33 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 5V'
value true
}
control.34 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 Loop'
value false
}
control.35 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 In Monitor'
value true
}
control.36 {
comment.access 'read write'
comment.type IEC958
comment.count 1
iface PCM
device 2
name 'IEC958 Playback Default'
value '0082000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
}
control.37 {
comment.access read
comment.type IEC958
comment.count 1
iface PCM
device 2
name 'IEC958 Playback Con Mask'
value ffffffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
}
control.38 {
comment.access 'read write inactive'
comment.type IEC958
comment.count 1
iface PCM
device 2
name 'IEC958 Playback PCM Stream'
value '0082000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
}
control.39 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 In Select'
value false
}
control.40 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface MIXER
name 'IEC958 In Phase Inverse'
value false
}
control.41 {
comment.access 'read write'
comment.type ENUMERATED
comment.count 1
comment.item.0 Mic-In
comment.item.1 'Center/LFE Output'
iface MIXER
name 'Mic-In Mode'
value Mic-In
}
control.42 {
comment.access 'read write'
comment.type BOOLEAN
comment.count 1
iface CARD
name Modem
value false
}
}
[-- Attachment #3: Type: text/plain, Size: 348 bytes --]
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: No sound with snd_cmipci
2006-10-09 14:09 ` Pierre Ossman
@ 2006-10-09 14:21 ` Lee Revell
2006-10-09 14:35 ` Pierre Ossman
0 siblings, 1 reply; 5+ messages in thread
From: Lee Revell @ 2006-10-09 14:21 UTC (permalink / raw)
To: Pierre Ossman; +Cc: Takashi Iwai, alsa-devel
On Mon, 2006-10-09 at 16:09 +0200, Pierre Ossman wrote:
> control.4 {
> comment.access 'read write'
> comment.type BOOLEAN
> comment.count 1
> iface MIXER
> name 'PCM Playback Switch'
> value false
> }
Does it work if you unmute PCM playback?
Lee
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: No sound with snd_cmipci
2006-10-09 14:21 ` Lee Revell
@ 2006-10-09 14:35 ` Pierre Ossman
0 siblings, 0 replies; 5+ messages in thread
From: Pierre Ossman @ 2006-10-09 14:35 UTC (permalink / raw)
To: Lee Revell; +Cc: Takashi Iwai, alsa-devel
Lee Revell wrote:
> On Mon, 2006-10-09 at 16:09 +0200, Pierre Ossman wrote:
>
>> control.4 {
>> comment.access 'read write'
>> comment.type BOOLEAN
>> comment.count 1
>> iface MIXER
>> name 'PCM Playback Switch'
>> value false
>> }
>>
>
> Does it work if you unmute PCM playback?
>
Afraid not. I haven't tried all combinations of mixer settings, but I
have changed every control at least once.
I have been using alsamixer though, so I hope it doesn't hide something
that amixer shows.
Rgds
Pierre
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2006-10-09 14:35 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-10-08 17:34 No sound with snd_cmipci Pierre Ossman
2006-10-09 13:34 ` Takashi Iwai
2006-10-09 14:09 ` Pierre Ossman
2006-10-09 14:21 ` Lee Revell
2006-10-09 14:35 ` Pierre Ossman
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