Re: CMI8738 sound card - cannot hear sound in Lenny
On Fri, 2009-01-16 at 01:04 +0100, Nigel Henry wrote:
> On Friday 16 January 2009 00:10, Robert Canner wrote:
> > Hi folks,
> >
> > I've installed a CMI8738 PCI sound card (C-Media 8738) on my dual-boot
> > machine. When I boot Windows, I can hear sound, but when I boot
> > GNU/Linux, I can't hear any sound.
> > [... snip ...]
> > ==
> > $ uname -a
> > Linux mercury 2.6.18-6-686 #1 SMP Fri Dec 12 16:48:28 UTC 2008 i686
> > GNU/Linux
> > ==
> > $ groups
> > robert dialout cdrom floppy audio video plugdev netdev powerdev
> > ==
>
> > $ lspci -v
> > ...
> > 02:00.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev
> > 10)
> > Subsystem: C-Media Electronics Inc CMI8738/C3DX PCI Audio Device
> > Flags: bus master, medium devsel, latency 32, IRQ 209
> > I/O ports at b800 [size=256]
> > Capabilities: <access denied>
> > ==
> > $ cat /proc/asound/cards
> > 0 [CMI8738 ]: CMI8738 - C-Media PCI CMI8738
> > C-Media PCI CMI8738 (model 37) at 0xb800, irq 209
> > [ ... snip ...]
>
> Hi Robert.
>
> Well the cards being detected according to /proc/asound/cards, and you're a
> member of the audio group. The card is supported with the alsa driver 1.0.16,
> which comes with Lenny, see below.
>
> Module snd-cmipci
> -----------------
>
> Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
>
> mpu_port - port address of MIDI interface (8338 only):
> 0x300,0x310,0x320,0x330 = legacy port,
> 0 = disable (default)
> fm_port - port address of OPL-3 FM synthesizer (8x38 only):
> 0x388 = legacy port,
> 1 = integrated PCI port (default on 8738),
> 0 = disable
> soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
> (default = 1)
> joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
>
> This module supports autoprobe and multiple cards.
>
> The power-management is supported.
>
> You may just need to open alsamixer in Gnomes terminal, and check the sound
> levels, or for any controls that may be muted. the "M" key toggles the
> mute/unmute.
>
> Running the command, "speaker-test" , without the quotes, should give you some
> pink noise output from your speakers (CTRL +C to quit speaker-test), if all
> the levels are ok, and nothing is muted that should be unmuted. The usual
> controls that need to be up are, Master, PCM, Front, CD.
>
> I don't use Gnome, but KDE, but it's worth right clicking on Gnomes volume
> control (top right), and see if anythings muted. I'm not sure if it's a right
> or left click, but there should also be a button for the mixer there as well.
> Sorry for the lack of info, but it's getting a bit late here in
northern
> france, and I'm about to crash out.
Many thanks Nigel, I hope you slept well :-)
First, Gnome Volume Control looks OK. (Master, PCM, Line-in, CD and PC
Speaker are all unmuted, with sliders at the top. Microphone is muted,
but I don't have a microphone connected anyway.)
I've never used alsamixer before -- here is what I see:
PCM, Line, CD, Phone = 100, 100, unmuted
Synth = 100, 100, muted
Master = 100, 100 (**but no mute/unmute box is shown**)
3D Contr = unmuted (but no volume box is shown)
And speaker-test gives following **error messages**:
==
speaker-test 1.0.13
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
ALSA lib pcm_dmix.c:864:(snd_pcm_dmix_open) unable to open slave
Playback open error: -16,Device or resource busy
[... repeated until I hit Ctrl-C]
===
Next I listed open files (after reading
http://www.debianhelp.org/node/12012 ):
==
$ lsof -w | egrep 'snd|dsp|NAME'
COMMAND PID USER ... NODE NAME
esd 3169 robert ... 5675 /dev/dsp
mixer_app 3241 robert ... 5685 /dev/snd/controlC0
==
and killed the 'esd' process.
Then I tried speaker-test again:
==
speaker-test 1.0.13
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
0 - Front Left
Time per period = 2.664647
0 - Front Left
Time per period = 2.985804
0 - Front Left
Time per period = 2.985816
0 - Front Left
Time per period = 2.985820
==
... but I still can't hear any sound.
Has anyone any further ideas?
Thank you very much,
Robert
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