dmesg should say "new SuperSpeed USB device number X using xhci_hcd" or
"new SuperSpeed Gen 1 USB device number X using xhci_hcd" if you have a
newer kernel.
"high-speed" means USB 2.0.
Ron
On 3/18/20 03:41, Rodolphe Bertolini via USRP-users wrote:
Dear all,
I have been using a USRP B210 on a laptop for months now. For reasons,
I switched to another Linux session, and using this session UHD fails
to talk to B210 over USB 3.0
dmesg tells me it is using the xhci_hcd driver (which I believe is the
driver for USB 3.0), and is also mentioning "new high-speed USB",
which leads me to think that USB 3.0 link is well recognized and active:
[ 306.133028] usb 1-1: new high-speed USB device number 16 using xhci_hcd
[ 306.260349] usb 1-1: New USB device found, idVendor=2500,
idProduct=0020
[ 306.260351] usb 1-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 306.260352] usb 1-1: Product: USRP B200
[ 306.260354] usb 1-1: Manufacturer: Ettus Research LLC
[ 306.260355] usb 1-1: SerialNumber: 31B9289
However, when running any uhd command line, it fails using USB 3.0:
[INFO] [UHD] linux; GNU C++ version 5.4.0 20160609; Boost_105800;
UHD_3.15.0.0-release
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 2.
I have also tried with UHD 3.14.1, no improvement.
I remember having a similar issue (maybe the same?) that had been
solved with something related to udev, but I sadly didn't take any
note of this.
Do you have any hint?
Thank you.
Regards,
Rodolphe
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