Getting libusb error in ubuntu while trying to run 2 Kinects

Question

I'm trying to run two Kinects v2 on the same machine (using libfreenect2 for ubuntu 14.04). The one is connected to motherboard USB3 host, and the other to PCI-E NEC host. Both work fine separately, but if I run one and then run another while the first is running, I get the following error for the second kinect:

[Error] [protocol::CommandTransaction] bulk transfer failed! libusb error -1: LIBUSB_ERROR_IO

I know that it is possible to run multiple kinects on the same machine, but can't figure out what causes this error. I also tried some other hosts that didn't help. Does anyone know how to fix it?

Thanks!

Answer 1

Solved the problem: need to allocate bigger memory buffer to usbfx, and don't do that using

sudo modprobe usbcore usbfs_memory_mb=64

Rather better do it by correcting the grub file (more here: https://www.ptgrey.com/tan/10685).