Are you using the Ettus supplied cable? Controllers will disconnect devices when they sense excess noise on the cable.
Sent from my iPhone > On Jul 12, 2021, at 3:27 PM, shachar J. brown <[email protected]> wrote: > > > Hi Marcus, > > Thanks for the reply. > > I believe this is not a power problem as the B210 was fed with an external > power. > The problem still thrives, any further suggestions are more than welcomed. > > BR, > Steve > >> On Thu, Jun 24, 2021 at 7:28 PM Marcus D. Leech <[email protected]> >> wrote: >> On 06/24/2021 02:31 AM, shachar J. brown wrote: >>> Hi everyone, >>> >>> I am trying to run the given tx_samples_from_file example. >>> Unfortunately, I keep receiving the uhd::usb_error, approximately 5-30 >>> minutes into the run. >>> >>> Technical specs: >>> USRP: B210. >>> Host: Intel Nuc, Core i7, 8th gen. >>> OS: Ubuntu 20 >>> UHD Version: 4.1.0 >>> USB Controler: XHCI (USB3). >>> >>> Error print: >>> [ERROR] [TX-STREAM] The tx_stream timed out sending 5000 samples (4080 >>> sent). >>> [ERROR] [UHD] An unexpected exception was caught in a task loop.The task >>> loop will now exit, things may not work.EnvironmentError: IOError: usb rx8 >>> transfer status: LIBUSB_TRANSFER_NO_DEVICE >>> terminate called after throwing an instance of 'uhd::usb_error' >>> what(): RuntimeError: USBError -4: usb tx4 submit failed: >>> LIBUSB_ERROR_NO_DEVICE >>> Aborted (core dumped) >>> >>> dmesg output: >>> [19924.922965] usb 4-2: USB disconnect, device number 7 >>> [19925.195595] usb 4-2: new SuperSpeed Gen 1 USB device number 8 using >>> xhci_hcd >>> [19925.217437] usb 4-2: LPM exit latency is zeroed, disabling LPM. >>> [19925.220417] usb 4-2: New USB device found, idVendor=2500, >>> idProduct=0020, bcdDevice= 0.00 >>> [19925.220422] usb 4-2: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [19925.220426] usb 4-2: Product: USRP B200 >>> [19925.220429] usb 4-2: Manufacturer: Ettus Research LLC >>> [19925.220431] usb 4-2: SerialNumber: 31F80A2 >>> >>> Is anyone familiar with this fault? >>> I would appreciate any help on the matter. >>> >>> Thanks in advance, >>> Steve >>> >>> >> My guess is that your NUC USB controller is unhappy with power consumption. >> Are you using external power on the B2xx, or relying >> on USB3 power? >> >> Also, several years ago, there was an interaction between certain >> controllers and kernel power-saving features that caused the >> controller to disconnect stuff even if it was being used. But I can't for >> the live of me remember which driver parameter one >> had to change to fix this. It has been several years since this was a >> problem. >> >> >> _______________________________________________ >> USRP-users mailing list -- [email protected] >> To unsubscribe send an email to [email protected]
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