[ubuntu-studio-users] ALSA module ordering

[Ralf Mardorf]

Hi,

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When using two USB devices, there's nothing we could do, to get a fixed
ordering for those two different connected USB devices,
by /etc/modprobe.d/alsa-base.conf. There might be a way to solve this
issue, but I've got no time to help you with this and perhaps this
issue can't be solved.

There are two possible pitfalls for real-time audio
usage, irq/18-firewire shares the IRQ with USB, consider to unload the
firewire module, if you shouldn't need it. Avoid to use the USB port
that shares the IRQ with irq/21-nvkm.

From /etc/default/rtirq RTIRQ_NAME_LIST="snd usb i8042" you should
remove i8042, you also could remove snd, but for your setup it doesn't
matter if you keep or remove snd. i8042 gives real-time priority to
PS/2 keyboards and mice, even if you should use a PS/2 keyboard and/or
mouse, usually there's no need to give it real-time priority.

Regards,
Ralf