Hi everyone, i have posted this on the planet ccrma list before, but i don't think it's a distribution problem. I get xruns when using a m-audio fast track pro usb soundcard at 44100Hz, frames/period=64 (same with 128, i need low latency) ,periods/buffer=2 with my new laptop when i have for example freewheeling, tapeutape and jack-rack running (xruns seem to appear when the dsp load rises, i've got none when using tapeutape alone for example). Some of them were related to the latest ccrma kernel, and they disappeared with a previous one. For the other ones, i have 4 ideas : 1) latency timer : doing lspci, all the latencies show 0 , even when i set them to antoher value with setpci. But with dmesg, i can see that at startup they are set to 64. Fernando Lopez-Lezcano told me that on some hardware latency timer couldn't be changed and that 64 could be enough actually. (forgot to say that the usb irq isn't shared) So it looks like i can't do anything for that. 2) rtc : At startup i have a message from udev : Node Symlink... node /dev/rtc already exists , link to /dev/rtc0 will not overwrite it. 3) soundcard power The fast track pro can be powered by usb or by an external power supply. Mine is usb powered for now. Is this a problem ? 4) rtirq I noticed that in the rtirq script , i have these lines: RTIRQ_NAME_LIST="rtc snd usb i8042" RTIRQ_NON_THREADED="rtc snd" Do they need to be changed when using a usb soundcard ? If anyone has an idea on that... Sorry it was quite long !! Thanks Flo _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
