[pulseaudio-tickets] [PulseAudio] #697: Sound distortion with pulseaudio, HDA intel and Realtek

[PulseAudio]

#697: Sound distortion with pulseaudio, HDA intel and Realtek
--------------------+-------------------------------------------------------
 Reporter:  cvine   |       Owner:  lennart
     Type:  defect  |      Status:  new    
Milestone:          |   Component:  daemon 
 Keywords:          |  
--------------------+-------------------------------------------------------
 I have recently obtained a Levono S12 netbook which uses an HDA Intel
 sound card with Realtek ALC269 chip.  I am using pulseaudio-0.9.19, with
 alsa-lib-1.0.21a and and the pulseaudio plugin from alsa-plugins-1.0.21,
 and the alsa driver with the 2.6.31.5 linux kernel.

 Sound playing starts off OK, but at random intervals it becomes high
 pitched and "scratchy" (tonality is lost).  This can happen when starting
 any new sound output although it is often triggered by a sound event
 occuring via libcanberra at the same time as pulseaudio is playing
 something else.  Normal sound can usually be restored by stopping any
 program such as totem which is playing (the now-distorted) sound, and
 changing volume levels with alsamixer or the pulseaudio volume control.
 If that doesn't work (it doesn't always) normal sound will be restored if
 no sound is outputted for a period (say 10 seconds).  Normal sound can
 also be restored by stopping and restarting pulseaudio.  dmesg does not
 report anything when this happens.  I run pulseaudio as a user daemon (not
 a system daemon).

 This occurs whether sound is being played by pulseaudio directly (eg
 libcanberra or totem) or via the alsa plugin.

 I have tried pulseaudio-0.9.17, but I get the same effect with that.

 Sound works normally if I do not start pulseaudio and use alsa and
 gstreamer directly.

 lspci -v gives the following audio hardware information:

 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High
 Definition Audio Controller (rev 02)
         Subsystem: Lenovo Unknown device 3be9
         Flags: bus master, fast devsel, latency 0, IRQ 22
         Memory at fc140000 (64-bit, non-prefetchable) [size=16K]
         Capabilities: [50] Power Management version 2
         Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+
 Queue=0/0 Enable-
         Capabilities: [70] Express Root Complex Integrated Endpoint, MSI
 00
         Capabilities: [100] Virtual Channel <?>
         Capabilities: [130] Root Complex Link <?>
         Kernel driver in use: HDA Intel
         Kernel modules: snd-hda-intel

 lsmod | egrep "snd|sound" gives:

 snd_seq_dummy           2592  0
 snd_seq_oss            27648  0
 snd_seq_midi_event      6076  1 snd_seq_oss
 snd_seq                46576  5
 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
 snd_seq_device          6280  3 snd_seq_dummy,snd_seq_oss,snd_seq
 snd_pcm_oss            37024  0
 snd_mixer_oss          15644  1 snd_pcm_oss
 snd_hda_codec_realtek   199520  1
 snd_hda_intel          24680  4
 snd_hda_codec          64092  2 snd_hda_codec_realtek,snd_hda_intel
 snd_hwdep               6752  1 snd_hda_codec
 snd_pcm                67776  3 snd_pcm_oss,snd_hda_intel,snd_hda_codec
 snd_timer              19236  2 snd_seq,snd_pcm
 snd                    51556  19
 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
 soundcore               6112  1 snd
 snd_page_alloc          8164  2 snd_hda_intel,snd_pcm

 Is there any further information I can provide?

-- 
Ticket URL: <http://pulseaudio.org/ticket/697>
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