[pulseaudio-tickets] [PulseAudio] #413: Noise crackling/Popping when PCM muted

[PulseAudio]

#413: Noise crackling/Popping when PCM muted
--------------------+-------------------------------------------------------
 Reporter:  davie   |       Owner:  lennart
     Type:  defect  |      Status:  new    
 Priority:  normal  |   Milestone:         
Component:  daemon  |    Severity:  normal 
 Keywords:          |  
--------------------+-------------------------------------------------------
 When PCM is muted and audio is playing, then instead of hearing no sound I
 hear a crackling/popping noise.
 Audio is fine when PCM is at anything other than zero.
 I'm using ubuntu 8.10, 0.9.10, and a built in intel sound card on a dell
 d620 laptop.

 There are quite a few reports in the ubuntu bugtracker about this issue,
 see for example:
  * https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/220842
  * https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/272321

 lspci -vvnn gives
 lspci gives:
 {{{
 00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High
 Definition Audio Controller [8086:27d8] (rev 01)
         Subsystem: Dell Device [1028:01c2]
         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 21
         Region 0: Memory at efffc000 (64-bit, non-prefetchable) [size=16K]
         Capabilities: [50] Power Management version 2
                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
 PME(D0+,D1-,D2-,D3hot+,D3cold+)
                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+
 Queue=0/0 Enable-
                 Address: 0000000000000000  Data: 0000
         Capabilities: [70] Express (v1) Root Complex Integrated Endpoint,
 MSI 00
                 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s
 <64ns, L1 <1us
                         ExtTag- RBE- FLReset-
                 DevCtl: Report errors: Correctable- Non-Fatal- Fatal-
 Unsupported-
                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
                         MaxPayload 128 bytes, MaxReadReq 128 bytes
                 DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+
 TransPend-
                 LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown,
 Latency L0 <64ns, L1 <1us
                         ClockPM- Suprise- LLActRep- BwNot-
                 LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                 LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk-
 DLActive- BWMgmt- ABWMgmt-
         Capabilities: [100] Virtual Channel <?>
         Capabilities: [130] Root Complex Link <?>
         Kernel driver in use: HDA Intel
         Kernel modules: snd-hda-intel
 }}}

 Let me know if there's anything else i can do to help debug this.

-- 
Ticket URL: <http://www.pulseaudio.org/ticket/413>
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