[PD-dev] Re: 0.39-test6 ALSA audio broken?

Claude Heiland-Allen claudiusmaximus at goto10.org
Mon Aug 29 02:12:27 CEST 2005


Hi Miller,

Miller Puckette wrote:
> Hi Claude,
> 
> This is weird behavior indeed... what audio hardware are you using?

The onboard sound on my laptop:

# lsmod | grep snd
snd_virmidi             3200  0
snd_seq_virmidi         5952  1 snd_virmidi
snd_rawmidi            20640  1 snd_seq_virmidi
snd_seq_midi_event      5824  1 snd_seq_virmidi
snd_seq                50512  2 snd_seq_virmidi,snd_seq_midi_event
snd_seq_device          7244  2 snd_rawmidi,snd_seq
snd_pcm_oss            48032  1
snd_mixer_oss          17216  1 snd_pcm_oss
snd_rtctimer            2576  0
snd_intel8x0           29568  2
snd_ac97_codec         83004  1 snd_intel8x0
snd_pcm                82568  3 snd_pcm_oss,snd_intel8x0,snd_ac97_codec
snd_timer              21700  3 snd_seq,snd_rtctimer,snd_pcm
snd                    49220  14 
snd_virmidi,snd_seq_virmidi,snd_rawmidi,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_rtctimer,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
snd_page_alloc          7748  2 snd_intel8x0,snd_pcm
soundcore               7456  3 snd,usb_midi
rtc                    10744  1 snd_rtctimer

# lspci -v
0000:00:1f.5 Multimedia audio controller: Intel Corporation 
82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
         Subsystem: ASUSTeK Computer Inc.: Unknown device 1893
         Flags: bus master, medium devsel, latency 0, IRQ 7
         I/O ports at ee00
         I/O ports at e000 [size=64]
         Memory at ffaff800 (32-bit, non-prefetchable) [size=512]
         Memory at ffaff400 (32-bit, non-prefetchable) [size=256]
         Capabilities: [50] Power Management version 2

I noticed that the modem (which I don't use) and the Cardbus Bridge 
(which I don't use either) also use IRQ 7, but I don't know what this means.


Claude

> I'm running nothing but ALSA these days and haven't had that  kind of
> problem...
> 
> 
> On Fri, Aug 26, 2005 at 01:27:45AM +0100, Claude Heiland-Allen wrote:
> 
>>Hi Miller, and others,
>>
>>With ALSA audio output I get:
>>
>>tried but couldn't sync A/D/A
>>^^^ repeated many times
>>
>>audio I/O error history:
>>seconds ago     error type
>>     3.00       A/D/A sync
>>     3.00       DAC blocked
>>     3.00       A/D/A sync
>>     3.00       DAC blocked
>>     3.00       A/D/A sync
>>     3.00       DAC blocked
>>     3.00       A/D/A sync
>>     6.92       DAC blocked
>>     6.92       A/D/A sync
>>     6.92       DAC blocked
>>     6.92       A/D/A sync
>>     7.09       DAC blocked
>>     7.09       A/D/A sync
>>     7.09       DAC blocked
>>     7.09       A/D/A sync
>>     7.09       DAC blocked
>>     7.09       A/D/A sync
>>     7.09       DAC blocked
>>     7.09       A/D/A sync
>>     7.44       DAC blocked
>>
>>I set the buffer size to as high as 500ms and still got >100ms audio 
>>dropouts every few seconds, which is obviously no good at all.
>>
>>PortAudio with /dev/dsp works fine with the same settings, no dropouts 
>>at all, so I guess that's what I'll use for now.  I have yet to try 
>>JACK, and OSS didn't work at all (no devices to choose from, which is 
>>strange because PortAudio works fine with /dev/dsp)
>>
>>
>>Claude





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