[LAU] Xruns and Thinkpad T60

[Raphael Bollen]

> -----Oorspronkelijk bericht-----
> Van: Karsten Wiese
> Verzonden: woensdag 19 december 2007 16:55
> Aan: linux-audio-user at lists.linuxaudio.org
> CC: Raphael Bollen
> Onderwerp: Re: [LAU] Xruns and Thinkpad T60
> 
> 
> Am Montag, 17. Dezember 2007 schrieb Raphael Bollen:
> > Hi Everyone,
> > 
> > I'm struggling to transform a Thinkpad T60 into a decent 
> audio system. I've installed ubuntu studio Feisty and a 
> realtime kernel from texware.it. When I run jack in realtime 
> mode using for 
> example 512 frames/period, it shows in its messages a lot 
> (>10/sec) late driver wakeup warnings and does a lot of xruns 
> (>1/sec). I've changed the IRQ priority of the sound card (an 
> HDA intel) to 
> realtime but this does not change the warnings/xruns. It's 
> not the first time I setup a computer for audio and so far 
> succeded using 64 frames/period. Here I tried every settings I could 
> (periods/buffer, samplerate, even tried with a Maudio Fast 
> track pro) but still no joy.
> > 
> > This Thinkpad has an ATI graphic card (not on the same IRQ 
> as the sound card) and uses fglrx driver. Could this be the 
> culprit? Is there another (free) driver I could use? Does 
> anyone have an 
> idea of what to try next?
> 
> Maybe this helps:
> Using a 2.6.24-rc5 kernel with jackd @builtin hda intel soundcard:
> 
> $ jackd -t100 -RP 80 -d alsa -d hw:0 -p128 -n3
> 
> The -t100 and the -n3 took me some time to find out.
> With em the only thing noticed so far to stall jackd was $ lsusb.
> 
>       Karsten
> 

Thank you for this information and sorry I couldn't reply sooner. I have now found that the soundcard is sharing  its interrupt with ipw3945 (wifi driver) and it's probably the reason for the xruns. I'll try to deactivate the driver when I get access to this computer again (it's not mine and remote debugging is not always easy...)


Best regards and Merry Christmas everyone

-- 
Raphaël.