Hi All.
Recently I bought new 5.1 speakers and was trying to set 5.1 surround
sound with Alsa 1.0.14rc1. I didn't managed to do that using all
knowledge that can be found in Uncle Google, so I went into debug mode
and found following message (I also added some more variable prints so
this is ,,extended'' message) in my kernel log:
Jan 12 23:30:45 slawek kernel: ALSA /NORA/SlaP4/tmp/alsa-driver-1.0.14rc1/acore/../alsa-kernel/cor
e/pcm_lib.c:207: Unexpected hw_pointer value [1] (stream = 0, delta: -3, max jitter = 2730, period
s = 4, period size = 0x555, hw_ptr_base = 0x0, new_hw_ptr = 0x552, runtime->hw_ptr_interrupt = 0x0
, hw_ptr_interrupt = 0x555, pos = 0x552) : wrong interrupt acknowledge?
Jan 12 23:30:45 slawek kernel: [<e02a8ceb>] snd_pcm_period_elapsed+0x1e6/0x339 [snd_pcm]
Jan 12 23:30:45 slawek kernel: [<e0068cf4>] azx_interrupt+0x52/0x95 [snd_hda_intel]
Jan 12 23:30:45 slawek kernel: [<c0131f75>] handle_IRQ_event+0x1a/0x3f
Jan 12 23:30:45 slawek kernel: [<c01330ed>] handle_fasteoi_irq+0x7c/0xae
Jan 12 23:30:45 slawek kernel: [<c0104f99>] do_IRQ+0x7d/0xa4
Jan 12 23:30:45 slawek kernel: [<c01033ce>] common_interrupt+0x1a/0x20
Jan 12 23:30:45 slawek kernel: [<c0100f2d>] mwait_idle_with_hints+0x3b/0x3f
Jan 12 23:30:45 slawek kernel: [<c0100f3d>] mwait_idle+0xc/0x1b
Jan 12 23:30:45 slawek kernel: [<c010193e>] cpu_idle+0x5e/0x74
Jan 12 23:30:45 slawek kernel: [<c037b6ec>] start_kernel+0x338/0x340
Jan 12 23:30:45 slawek kernel: [<c037b1ae>] unknown_bootoption+0x0/0x206
Jan 12 23:30:45 slawek kernel: =======================
AFAIK this message is harmless if it comes from snd_pcm_update_hw_ptr
but in this case it comes from snd_pcm_update_hw_ptr_interrupt. It
looks like irq is not handled correctly - I think (not sure, I'm not
expert in that field). Message occurs also with pci=noacpi
specified. I haven't tried single_cmd, but can do that if
necessary. I don't know whether it is kernel or sloppy hardware
problem.
Now, more detailed information's about my setup:
1) Output from aadebug:
Kernel ----------------------------------------------------
Linux slawek 2.6.19.2 #1 SMP Fri Jan 12 19:55:58 CET 2007 i686 prescott i386 GNU/Linux
Loaded Modules --------------------------------------------
snd_hda_intel 15512 0
snd_hda_codec 193792 1 snd_hda_intel
snd_pcm 67844 2 snd_hda_intel,snd_hda_codec
snd_timer 17668 1 snd_pcm
snd_page_alloc 7432 2 snd_hda_intel,snd_pcm
snd 46444 5 snd_hda_intel,snd_hda_codec,snd_pcm,snd_timer
Modprobe Conf ---------------------------------------------
alias snd-card-0 snd-hda-intel
options snd-hda-intel model=full
alias sound-slot-0 snd-hda-intel
Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.14rc1.
Compiled on Jan 12 2007 for kernel 2.6.19.2 (SMP).
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xcfef4000 irq 16
0: [ 0] : control
16: [ 0- 0]: digital audio playback
24: [ 0- 0]: digital audio capture
33: : timer
00-00: CMI9880 : CMI9880 : playback 1 : capture 2
Dev Snd ---------------------------------------------------
controlC0 pcmC0D0c pcmC0D0p timer
CPU -------------------------------------------------------
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz : 3010.848
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz : 3010.848
RAM -------------------------------------------------------
MemTotal: 508188 kB
SwapTotal: 2000084 kB
2) lspci
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio
Controller (rev 03)
00:1b.0 0403: 8086:2668 (rev 03)
Subsystem: 1043:813d
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2
B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <P
ERR-
Latency: 0, Cache Line Size: 16 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at cfef4000 (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: 64bit+ Queue=0/0 Enable-
Address: 0000000000000000 Data: 0000
Capabilities: [70] Express Unknown type IRQ 0
Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
Device: Latency L0s <64ns, L1 <1us
Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
Link: Supported Speed unknown, Width x0, ASPM unknown, Port 0
Link: Latency L0s <64ns, L1 <1us
Link: ASPM Disabled CommClk- ExtSynch-
Link: Speed unknown, Width x0
If You need more information's, please let me know. I've very limited
access to network so my answers might be delayed.
Best Regards
Jacek Luczak
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