On 07/12/2018 05:22 AM, Yeats Luo via USRP-users wrote:


Dear all:

This might be a common problem to many of you but I can’t solve it on my own.

The machine is Dell desktop acquired in recent year, OS is uBuntu 14.04.04 ith XCHI enabled kernel.

The USRP B210 is literally attached to the USB 3.0 port with a proper cable, but was immediately recognized as a USB 2.0 device based on dmesg/lsusb/uhd_usrp_probe messages.

Various tweaking and switching tricks are in vain. Computer was changed, BIOS was checked. Whether to install UHD driver is proven irrelevant. There’s even no legacy options to turn off in the BIOS.

Expecting any expert to direct us out of this mist.  Regards,

root@usrp:/# lsusb -t

/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M

|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M

|__ Port 4: Dev 19, If 0, Class=Vendor Specific Class, Driver=, 480M

|__ Port 4: Dev 19, If 1, Class=Vendor Specific Class, Driver=, 480M

|__ Port 4: Dev 19, If 2, Class=Vendor Specific Class, Driver=, 480M

|__ Port 4: Dev 19, If 3, Class=Vendor Specific Class, Driver=, 480M

|__ Port 4: Dev 19, If 4, Class=Vendor Specific Class, Driver=, 480M

/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M

    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M

/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M

root@usrp:/# usb-devices

....

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh= 6

D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1

P:  Vendor=1d6b ProdID=0003 Rev=03.19

S:  Manufacturer=Linux 3.19.0-61-lowlatency xhci-hcd

S:  Product=xHCI Host Controller

S:  SerialNumber=0000:00:14.0

C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA

I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

....

T:  Bus=04 Lev=02 Prnt=02 Port=03 Cnt=01 Dev#= 19 Spd=480 MxCh= 0

D:  Ver= 2.10 Cls=ff(vend.) Sub=00 Prot=00 MxPS=64 #Cfgs=  1

P:  Vendor=2500 ProdID=0020 Rev=00.00

S:  Manufacturer=Ettus Research LLC

S:  Product=USRP B200

S:  SerialNumber=312AC75

C:  #Ifs= 5 Cfg#= 1 Atr=80 MxPwr=2mA

I:  If#= 0 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

I:  If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

I:  If#= 2 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

I:  If#= 3 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

I:  If#= 4 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

root@usrp:/# uhd_usrp_probe

[INFO] [UHD] linux; GNU C++ version 4.8.4; Boost_105400; UHD_3.12.0.0-release

[INFO] [B200] Detected Device: B210

[INFO] [B200] Operating over USB 2.

[INFO] [B200] Initialize CODEC control...

[INFO] [B200] Initialize Radio control...

[INFO] [B200] Performing register loopback test...

[INFO] [B200] Register loopback test passed

[INFO] [B200] Performing register loopback test...

[INFO] [B200] Register loopback test passed

[INFO] [B200] Setting master clock rate selection to 'automatic'.

[INFO] [B200] Asking for clock rate 16.000000 MHz...

[INFO] [B200] Actually got clock rate 16.000000 MHz.


You might try a more recent version of Ubuntu.   14.04 is very old.


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