[pulseaudio-tickets] [PulseAudio] #491: Crackling, skipping and /var/log/messages spamming

[PulseAudio]

#491: Crackling, skipping and /var/log/messages spamming
---------------------+------------------------------------------------------
 Reporter:  liviopl  |       Owner:  lennart
     Type:  defect   |      Status:  new    
 Priority:  normal   |   Milestone:  0.9.15 
Component:  daemon   |    Severity:  major  
 Keywords:           |  
---------------------+------------------------------------------------------
 My hardware has recently changed twice and problems still exist.

 VIA8235 (snd-via82xx) → VIA8237 (actually C-Media CMI9761A; snd-via82xx
 too) → Creative Sound Blaster Audigy SE (snd-ca0106)

 You can't tell me it's hardware question, because the hardware is first
 quality.

 Also, NVIDIA's driver and Ralink's WiFi firmware aren't the problem. PA <
 0.9.10 had no problems with crackling and skipping at all. Some rewrites
 might have happened in between.

 All the time I'm having the >= 0.9.10, PA is spamming (almost every
 second!) in /var/log/messages with:

 [[[ ALSA woke us up to write new data to the device, but there was
 actually nothing to write! ]]]

 tsched=0 makes PA crackle even more.

 --

 openSUSE 11.1, PA 0.9.14 from a testrepo (to try out if bug appears in
 non-distro version; 0.9.13 is shipped).

 client.conf: no options set.
 daemon.conf: http://wklej.org/id/55927/
 default.pa : http://wklej.org/id/55929/

 --

 lspci -vvv info about the soundcard:

 [[[ 00:0c.0 Multimedia audio controller: Creative Labs SB Audigy LS
         Subsystem: Creative Labs SB0570 [SB Audigy SE]
         Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
 ParErr- Stepping- SERR- FastB2B- DisINTx-
         Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
 <TAbort- <MAbort- >SERR- <PERR- INTx-
         Latency: 32 (500ns min, 5000ns max)
         Interrupt: pin A routed to IRQ 16
         Region 0: I/O ports at d400 [size=32]
         Capabilities: <access denied>
         Kernel driver in use: CA0106
         Kernel modules: snd-ca0106 ]]]

 --

 /proc/asound/cards:

 [[[ 0 [CA0106         ]: CA0106 - CA0106
                       Audigy SE [SB0570] at 0xd400 irq 16 ]]]

 PS: Onboard card (C-Media CMI9761A disabled in BIOS).

 --

 /proc/asound/version:

 Advanced Linux Sound Architecture Driver Version 1.0.17.

 --

 Interesting is that when I turn on "CAPTURE feedback" playback control on,
 PA crackles when I'm typiing, scrolling etc.

 Also, any SDL app makes PA go crazy, regardless of SDL_AUDIODRIVER.
 SDL_AUDIODRIVER=esd makes PA crackle less than in SDL_AUDIODRIVER=pulse
 mode. Funny.

 --

 If more info needed, just ask.

-- 
Ticket URL: <http://pulseaudio.org/ticket/491>
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