Alsa 0.9.0, intel8x0 staticky mess

Alsa 0.9.0, intel8x0 staticky mess

[Nathaniel Gray]

I'm running Mandrake 9.1 with Alsa 0.9.0rc7, snd-intel8x0 driver, on a 
Dell Inspiron 4150.  Here are some bits from lspci:

00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host 
Bridge (rev 04)
00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97 Audio 
(rev 02)

Any sounds played end up degenerating into static fuzz after a short 
period of time.  Occasionally I can successfully play a few seconds of 
a song with XMMS, but usually it's impossible.  The OSS intel8x0 driver 
doesn't have this problem, but I'd like to use Jack so I'm hoping to 
get Alsa going successfully.

Please let me know any further info I can provide.

Thank you,
-n8

-- 
>>>-- Nathaniel Gray -- Caltech Computer Science ------>
>>>-- Mojave Project -- http://mojave.cs.caltech.edu -->



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Re: Alsa 0.9.0, intel8x0 staticky mess

[Takashi Iwai]

At Sat, 26 Apr 2003 01:14:22 -0700,
Nathaniel Gray wrote:
> 
> I'm running Mandrake 9.1 with Alsa 0.9.0rc7, snd-intel8x0 driver, on a 
> Dell Inspiron 4150.  Here are some bits from lspci:
> 
> 00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host 
> Bridge (rev 04)
> 00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97 Audio 
> (rev 02)
> 
> Any sounds played end up degenerating into static fuzz after a short 
> period of time.  Occasionally I can successfully play a few seconds of 
> a song with XMMS, but usually it's impossible.  The OSS intel8x0 driver 
> doesn't have this problem, but I'd like to use Jack so I'm hoping to 
> get Alsa going successfully.

do you see any kernel messages?


Takashi


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Re: Alsa 0.9.0, intel8x0 staticky mess

[Nathaniel Gray]

On Monday 28 April 2003 06:16 am, Takashi Iwai wrote:
> Nathaniel Gray wrote:
> > Any sounds played end up degenerating into static fuzz after a
> > short period of time.  Occasionally I can successfully play a few
> > seconds of a song with XMMS, but usually it's impossible.  The OSS
> > intel8x0 driver doesn't have this problem, but I'd like to use Jack
> > so I'm hoping to get Alsa going successfully.
>
> do you see any kernel messages?

No kernel messages.  

Things have improved somewhat.  I upgraded to BIOS A05 for my machine 
and that helped a bit, but I still get the problem about once per song 
in xmms and I can even trigger it with a little script:
	while cat /proc/apm; do echo ''; done

(I saw the previous posts that seemed to suggest this was a bad 
interaction with apm.)

It doesn't happen on every read from /proc/apm.  Some cause a slight 
skip in xmms, some cause no skip at all, and some make the entire 
remainder of the song go staticky.  I could understand either of the 
first two problems but I don't understand what would mess things up far 
past the time of the disruption.

What else can I do to track down the problem?  I'm fine with C and I'm 
not a complete stranger to the kernel but I've never written or worked 
on a device driver.
-- 
>>>-- Nathaniel Gray -- Caltech Computer Science ------>
>>>-- Mojave Project -- http://mojave.cs.caltech.edu -->



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