[linux-audio-user] Re: Dual Core?

Oe Thu, Nov 16, 2006 at 11:11:01AM +0100, Julian Hagenauer wrote: In fact when I had problems related to tsc clock drift I had this type of errors : delay of XXX usecs exceeds estimated spare time of YYY; restart ... If this is your case you have to upgrade jackd, I'm afraid there is no simple way to do so. You'll have to compile yourself jack 0.102.20. If you have only : **** alsa_pcm: xrun of at least 1.105 msecs Here what I would check first : 1) Your audio card is not reliable Some cards have a fixed sample rate, just try to launch jackd with other sample rate. Did you check the card matrix on http://www.alsa-project.org to check if other people experienced the same problem? 2) Some issues with laptop I have seen very weird things with laptop. And I can't help here, I don't own a laptop... For example, can you see noticeable difference when your laptop is on AC Mains and on battery? 3) other process is running and do heavy load? check top and identify it. 4) Your kernel config check your PREEMPT config with zcat /proc/config.gz | grep CONFIG_PREEMPT If you have CONFIG_PREEMPT_NONE=y It is not very good for real-time audio you need at least CONFIG_PREEMPT_DESKTOP=y If you are not confident with kernel compilation I won't be able to help because I don't know where you can find such precomiled kernel for debian testing. But if you have xruns at 1024/2 frames I'm not sure it will help... Well I have no more clue, there is a solution somewhere don't give up :) Good luck David.