Re: Re: USB recording - repetitive peaks

[Patrick Shirkey <pshirkey@boosthardware.com>]

Patrick Shirkey wrote:
> Takashi Iwai wrote:
> 
>>
>> i (hopefully) found the spot.
>> it happend when snd_pcm_stop() is called during complete callbacks, so
>> the working urb won't be released properly.
>> now the fixed version is on cvs.
>>
> 
> Apparently not the g-spot.
> 
> I just tried using jack+ardour and the system hung again. This time it 
> may have been triggered when I tried to switch virtual desktops. (I'm 
> running enlightenment).
> 
> Everything was working (apart from peaks in the sound quality similar to 
> the ones we were hearing natively only more pronounced). When I tried to 
> switch into another part of the desktop everything hung.
> 
> I will try again because it may have been a time issue and therefore a 
> complete coincidence.
> 
> 

It seems to be directly related to stress on xfree which causes an xrun 
in jackd.

This time when I started up I had a clear signal and could switch 
screens without dropouts but when I downloaded some messages I caused an 
xrun and then the sound got all choppy. Still no hang so I tried moving 
the ardour editor window to a different screen and that was it.

I have a usb mouse and am using the nvidia drivers for my video card 
which is a 64MB geforce2. Plus I was running jackd as normal user.

However I can get normal recording and xfree performance if I don't use 
jack. That is whether I am root user or not.

So it sounds like you have sorted the problem (unless you can think of 
anything else) and I need to do some serious fine tuning to get JACK 
working correctly.

We still need a way to access all four channels at the same time though.




-- 
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.boosthardware.com/LAU/guide/
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