Hi!
My alsamixer PCM slider has no effect on volume, e.g. from mplayer or
flashplugin. Also, in alsamixer there is no opportunity to mute the PCM slider.
The Master slider in alsamixer works fine, so the mixer device chosen by
alsamixer is the correct one.
My sound card is hw:1 (defined as the default device), and there is no hw:0 at
the moment. I'm reserving hw:0 for my USB sound card when it is plugged in,
using the "slots" module option.
$ lspci -v -s 02:00.1
02:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 1312
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at faf7c000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
These details are probably also relevant:
$ uname -a
Linux asus 2.6.37 #1 SMP PREEMPT Sat Jan 29 12:58:20 CET 2011 x86_64 GNU/Linux
$ ls /dev/snd
by-path controlC1 controlC2 hwC1D0 hwC2D0 hwC2D1 hwC2D2 hwC2D3 pcmC1D0c
pcmC1D0p pcmC2D3p pcmC2D7p pcmC2D8p pcmC2D9p seq timer
While using mplayer:
$ fuser -v /dev/snd/*
USER PID ACCESS COMMAND
/dev/snd/controlC1: tmac 2713 f.... mixer_applet2
/dev/snd/pcmC1D0p: tmac 7097 F...m mplayer
/dev/snd/timer: tmac 7097 f.... mplayer
So mplayer funnels it sound through /dev/snd/pcmC1D0p.
While flashplugin is playing a youtube video:
$ fuser -v /dev/snd/*
USER PID ACCESS COMMAND
/dev/snd/controlC1: tmac 2713 f.... mixer_applet2
/dev/snd/pcmC1D0p: tmac 3274 F...m plugin-containe
/dev/snd/timer: tmac 3274 F.... plugin-containe
Some more info:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: NVidia [HDA NVidia], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 2: NVidia_1 [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia_1 [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia_1 [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: NVidia_1 [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
front:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
Front speakers
surround40:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
HDA NVidia, ALC269 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=NVidia_1
HDA NVidia, HDMI 0
HDMI Audio Output
Best regards
Torquil Sørensen
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