I have a USRP B205mini-i connected to a new Ubuntu 16.04 LTS laptop. The USB hardware is a standard Intel chipset and lsusb and lshw all show the hardware is in USB 3.0 mode. I've used external hard drives in the port before and I'm clearly getting USB3 performance.
However when the USRP starts up it reports "Operating over USB 2.". Has anyone run into this before and know how to get it to recognize it as USB3? (Running into overruns at 20 MSPS) Here's some other driver/hardware/firmware details I think is relevant: Latest USRP firmware images (as grabbed by uhd_images_downloader): http://files.ettus.com/binaries/images/uhd-images_003.010.002.000-rc1.zip Ubuntu Kernel:4.13.0-32-generic #35~16.04.1-Ubuntu SMP Thu Jan 25 10:13:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux uhd_find_devices output: [INFO] [UHDlinux; GNU C++ version 5.4.0 20160609; Boost_105800; UHD_3.11.0.git-215-g3b206caa] -------------------------------------------------- -- UHD Device 0 -------------------------------------------------- Device Address: serial: [Took this out for posting] name: B205i product: B205mini type: b200 USB Info: lshw: *-usbhost:1 product: xHCI Host Controller vendor: Linux 4.13.0-32-generic xhci-hcd physical id: 1 version: 4.13 capabilities: usb-3.00 configuration: driver=hub slots=8 speed=5000Mbit/s *-generic:2 description: Signal processing controller product: Sunrise Point-H LPSS I2C Controller #1 vendor: Intel Corporation physical id: 15.1 bus info: pci@0000:00:15.1 version: 31 width: 64 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: driver=intel-lpss latency=0 resources: irq:17 memory:a452c000-a452cfff lsusb Bus 002 Device 002: ID 2500:0022 Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 3.00 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 9 idVendor 0x2500 idProduct 0x0022 bcdDevice 0.00 iManufacturer 1 Ettus Research LLC iProduct 2 USRP B200 iSerial 3 3123C89
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