Hello, I am still struggling to track down problems with audio playback. I get intermittent: Apr 26 02:01:40 reforged [13230.947879] cannot submit sync urb (err = -45) I have tackled the scheduler issues to where I really don't think the driver is being starved at all. I am running audacious like so: schedtool -R -p 50 -n 1 -e audacious At this point the strongest correlation I can get is that starting programs seems to trigger the stutter. I have suspected IO for some time. My system image , / & /usr are on a libata (VIA PATA) driver. I have disabled the write-cache , but I also have noatime set on mount, for /usr My big suspicion is that one of my drivers, likely IO is disabling interrupts for too long. I have looked but not found a tool for measuring the longest period interrupts are disabled and pointing the finger at the culprit, could anyone on this list recommend tools that might help me pinpoint what is going on ? I would also be delighted for any sort of recommended latency testing tools. pin-pointing this is going to be a "learning experience" but every time I think I am about to have a bonding moment with the kernel audio skips; I am highly motivated. Cheers, Mike Mattie - [email protected]
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