Dear ALSA users,
please tell me if I should open a ticket for this issue in the ALSA
bugtracking system.
Using PulseAudio (PA) playing sound works without problems but running a
program accessing the microphone (`gnome-volume-control`, `empathy`
doing voice calls, …) causes high CPU loads of PulseAudio.
I reported this to the PulseAudio tracker as ticket #758 [1]. Debugging
this further this led to the following debug message by PA [2].
$ pulseaudio -k # `autospawn = 0` in `~/.pulse/client.conf`
$ LANG=C pulseaudio -vvvvv # `gnome-volume-control` started in
other terminal. ConsoleKit messages removed.
[…]
I: alsa-source.c: Increasing wakeup watermark to 361.50 ms
W: ratelimit.c: 52071 events suppressed
D: memblock.c: Pool full
D: memblock.c: Pool full
D: memblock.c: Pool full
D: memblock.c: Pool full
I: alsa-source.c: Overrun!
[…]
Searching for this error message on the WWW suggested that this is
related to the ALSA driver and somewhere it was suggested to load the
module with the option `position_fix=1`.
$ more /etc/modprobe.d/snd-hda-intel.conf
options snd_hda_intel position_fix=1
After this change programs accessing the microphone do not cause high
CPU loads anymore [3].
Is that the correct way to fix this problem? Is a quirk for my chip
needed to enable this option automatically?
I did not find a section for VIA chips in `HD-Audio-Models.txt` [4] as
suggested on the »Help To Debug Intel HDA« wiki page [5]. But this
appears to be not needed anyways since I am actually using a Realtek
ALC662 codec chip [6].
I am using Debian Sid/unstable with the following Linux kernel
$ uname -a
Linux name 2.6.32-trunk-amd64 #1 SMP Sun Jan 10 07:51:13 UTC 2010 x86_64 GNU/Linux
but a 32-bit userspace with `libasound2` 1.0.21a-1 installed.
You will find further information about my system at the end of this
message.
Thanks,
Paul
[1] http://pulseaudio.org/ticket/758
[2] http://pulseaudio.org/ticket/758#comment:11
[3] http://pulseaudio.org/ticket/758#comment:12
[4] http://git.alsa-project.org/?p=alsa-kernel.git;a=blob;f=Documentation/sound/alsa/HD-Audio-Models.txt;hb=HEAD
[5] http://www.alsa-project.org/main/index.php/Help_To_Debug_Intel_HDA#Reporting_problems
[6] What modules to use for VIA VT1708/A [Azalia HDAC]?
http://sourceforge.net/mailarchive/forum.php?thread_name=1265458849.3776.115.camel%40mattotaupa&forum_name=alsa-user
$ lspci -vvnn | grep -A10 Audio
20:01.0 Audio device [0403]: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High Definition Audio Controller) [1106:3288] (rev 10)
Subsystem: ASUSTeK Computer Inc. Device [1043:8290]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 17
Region 0: Memory at fbffc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
$ ls -l /proc/asound/
dr-xr-xr-x 6 root root 0 6. Feb 15:17 card0
-r--r--r-- 1 root root 0 6. Feb 15:17 cards
-r--r--r-- 1 root root 0 6. Feb 15:17 devices
-r--r--r-- 1 root root 0 6. Feb 15:17 hwdep
-r--r--r-- 1 root root 0 6. Feb 15:17 modules
dr-xr-xr-x 2 root root 0 6. Feb 15:17 oss
-r--r--r-- 1 root root 0 6. Feb 15:17 pcm
dr-xr-xr-x 2 root root 0 6. Feb 15:17 seq
-r--r--r-- 1 root root 0 6. Feb 15:17 timers
-r--r--r-- 1 root root 0 6. Feb 15:17 version
lrwxrwxrwx 1 root root 5 6. Feb 15:17 VT82xx -> card0
$ ls -l /proc/asound/card0
-r--r--r-- 1 root root 0 6. Feb 15:18 codec#0
-r--r--r-- 1 root root 0 6. Feb 15:18 id
-rw-r--r-- 1 root root 0 6. Feb 15:18 oss_mixer
dr-xr-xr-x 3 root root 0 6. Feb 15:18 pcm0c
dr-xr-xr-x 3 root root 0 6. Feb 15:18 pcm0p
dr-xr-xr-x 3 root root 0 6. Feb 15:18 pcm1c
dr-xr-xr-x 3 root root 0 6. Feb 15:18 pcm1p
$ more /proc/asound/card0/codec#0
Codec: Realtek ALC662 rev1
Address: 0
Function Id: 0x1
Vendor Id: 0x10ec0662
Subsystem Id: 0x10438290
Revision Id: 0x100101
No Modem Function Group found
Default PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
Node 0x02 [Audio Output] wcaps 0x1d: Stereo Amp-Out
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x40 0x40]
Converter: stream=0, channel=0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Node 0x03 [Audio Output] wcaps 0x1d: Stereo Amp-Out
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x40 0x40]
Converter: stream=0, channel=0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Node 0x04 [Audio Output] wcaps 0x1d: Stereo Amp-Out
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x40 0x40]
Converter: stream=0, channel=0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Node 0x05 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
Converter: stream=0, channel=0
Digital:
Digital category: 0x0
PCM:
rates [0x160]: 44100 48000 96000
bits [0x1e]: 16 20 24 32
formats [0x1]: PCM
Node 0x07 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
Amp-In caps: ofs=0x09, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x89 0x89]
Converter: stream=0, channel=0
SDI-Select: 0
PCM:
rates [0x160]: 44100 48000 96000
bits [0x6]: 16 20
formats [0x1]: PCM
Connection: 1
0x23
Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
Amp-In caps: ofs=0x09, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x18 0x18]
Converter: stream=0, channel=0
SDI-Select: 0
PCM:
rates [0x160]: 44100 48000 96000
bits [0x6]: 16 20
formats [0x1]: PCM
Connection: 1
0x22
Node 0x0a [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
Connection: 9
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16
Node 0x0c [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x00 0x00] [0x00 0x00]
Connection: 2
0x02 0x0b
Node 0x0d [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x00 0x00] [0x00 0x00]
Connection: 2
0x03 0x0b
Node 0x0e [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x00 0x00] [0x00 0x00]
Connection: 2
0x04 0x0b
Node 0x0f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x0001003c: IN OUT HP EAPD Detect
EAPD 0x2: EAPD
Pin Default 0x01014010: [Jack] Line Out at Ext Rear
Conn = 1/8, Color = Green
DefAssociation = 0x1, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Connection: 1
0x0c
Node 0x15 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x00010034: IN OUT EAPD Detect
EAPD 0x2: EAPD
Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
Conn = 1/8, Color = Black
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Connection: 1
0x0d
Node 0x16 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x00000034: IN OUT Detect
Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
Conn = 1/8, Color = Black
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Connection: 1
0x0e
Node 0x17 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
Amp-In vals: [0x00 0x00]
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x80 0x80]
Pincap 0x00001734: IN OUT Detect
Vref caps: HIZ 50 GRD 80
Pin Default 0x01a19840: [Jack] Mic at Ext Rear
Conn = 1/8, Color = Pink
DefAssociation = 0x4, Sequence = 0x0
Pin-ctls: 0x24: IN VREF_80
Unsolicited: tag=00, enabled=0
Connection: 1
0x0e
Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
Amp-In vals: [0x00 0x00]
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x80 0x80]
Pincap 0x0000173c: IN OUT HP Detect
Vref caps: HIZ 50 GRD 80
Pin Default 0x02a19950: [Jack] Mic at Ext Front
Conn = 1/8, Color = Pink
DefAssociation = 0x5, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x24: IN VREF_80
Unsolicited: tag=00, enabled=0
Connection: 2
0x0c* 0x0e
Node 0x1a [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x80 0x80]
Pincap 0x00000034: IN OUT Detect
Pin Default 0x0181304f: [Jack] Line In at Ext Rear
Conn = 1/8, Color = Blue
DefAssociation = 0x4, Sequence = 0xf
Pin-ctls: 0x20: IN
Unsolicited: tag=00, enabled=0
Connection: 1
0x0d
Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
Amp-In vals: [0x00 0x00]
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x00 0x00]
Pincap 0x0000173c: IN OUT HP Detect
Vref caps: HIZ 50 GRD 80
Pin Default 0x02214120: [Jack] HP Out at Ext Front
Conn = 1/8, Color = Green
DefAssociation = 0x2, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0xc0: OUT HP VREF_HIZ
Unsolicited: tag=00, enabled=0
Connection: 2
0x0c* 0x0e
Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
Pincap 0x00000020: IN
Pin Default 0x593301f0: [N/A] CD at Int ATAPI
Conn = ATAPI, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x20: IN
Node 0x1d [Pin Complex] wcaps 0x400000: Mono
Pincap 0x00000020: IN
Pin Default 0x4005c603: [N/A] Line Out at Ext N/A
Conn = Optical, Color = UNKNOWN
DefAssociation = 0x0, Sequence = 0x3
Pin-ctls: 0x20: IN
Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
Pincap 0x00000010: OUT
Pin Default 0x99430130: [Fixed] SPDIF Out at Int ATAPI
Conn = ATAPI, Color = Unknown
DefAssociation = 0x3, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Connection: 1
0x06
Node 0x1f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
Processing caps: benign=0, ncoeff=12
Processing Coefficient: 0x00
Coefficient Index: 0x06
Node 0x21 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x22 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
Connection: 10
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
Connection: 10
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x24 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x25 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x26 [Vendor Defined Widget] wcaps 0xf00000: Mono
Attachment:
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