#413: Noise crackling/Popping when PCM muted
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Reporter: davie | Owner: lennart
Type: defect | Status: new
Priority: normal | Milestone:
Component: daemon | Severity: normal
Keywords: |
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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>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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