LinuxMusicians

Thanks JamesPeters for bringing up "USB autosuspend"! In the meantime I have also found a casual mention of this in another discussion thread, and indeed for me that's the key. I added usbcore.autosuspend=-1 to the kernel boot parameters in /etc/default/grub, and now it runs smoothly for h...

With an external USB sound card (part of an Allen&Heath ZED 10 mixer) and using 64 frames/period and 2 periods/buffer, I get waves of xruns (hundreds to thousands) , with long quiet intervals in between (duration tens of minutes to hours). During such a wave (lasts from ~10 secs to a minute), I ...

Thanks a lot for these tips, very effective! Using watch cat /proc/interrupts it was indeed easy to see IRQ 57 is the one of the mixer, instead of 56 as indicated by lspci (maybe an issue of starting at zero or one?). Putting 'xhci_hcd' in /etc/default/rtirq resulted in all of the about 20 IRQs rela...

In order to debug an xrun issue at low latency, I wanted to try the rtirq script that is recommened to increase interrupt priority, but I cannot identify postively the IRQ that I need to use. My Allen&Heath mixer with integrated sound is connected to USB bus 5 (the only device on that bus). The ...