On Tue, 8 Aug 2017, Rafael Vega wrote:

I own a Presonus Audiobox 1818VSL which worked just fine on an older macbook
running Arch Linux. I switched computers recently and the Presonus gets a lot of
xruns on this new computers. I saw some posts that suggest that unit is not
compatible with USB 3 ports.

My understanding is that this particular problem is that it is a hardware problem with some of the Intel MB chipsets (not the cpu itself). The first thing to check however, is what else in your new computer is using the same usb port, or the same irq. Some people have better luck removing the USB3 driver and running the USB3 as USB2. Some have done better just adding a PCIe USB card (in a desktop). Rumour is NEC USB chipsets work better... but it could be just using a PCIe card on a fresh irq too.

Len Ovens

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