# No UHD Devices found in Parallel Ubuntu Linux

**URL:** <https://www.ruby-forum.com/t/no-uhd-devices-found-in-parallel-ubuntu-linux/230460>\
**Category:** GNU Radio\
**Created:** [June 19, 2014, 5:16am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-in-parallel-ubuntu-linux/230460 "2014-06-19T05:16:50Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [June 19, 2014, 5:16am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-in-parallel-ubuntu-linux/230460/1 "2014-06-19T05:16:50Z")

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The B200 works with out any problems if connected directly to the MAC  
OS, but a new ubuntu 14.04 install on parallels does not recognize the  
hardware:

root@gnuradio:/usr/bin# uhd\_find\_devices  
linux; GNU C++ version 4.8.2; Boost\_105400;  
UHD\_003.005.004-140-gfb32ed16

No UHD Devices Found

root@gnuradio:/usr/bin# dpkg -l | grep uhd  
ii libgnuradio-uhd3.7.2.1:amd64 3.7.2.1-5  
amd64 gnuradio universal hardware driver functions  
ii libuhd003:amd64 3.5.5-1  
amd64 universal hardware driver for Ettus R. products  
ii uhd-host 3.5.5-1  
amd64 universal hardware driver for Ettus R. products

Also, dmesg reports this as follows:

[124.884256] usb 1-2: new high-speed USB device number 3 using  
ehci-pci  
[125.017856] usb 1-2: New USB device found, idVendor=2500,  
idProduct=0020  
[125.017859] usb 1-2: New USB device strings: Mfr=1, Product=2,  
SerialNumber=3  
[125.017860] usb 1-2: Product: WestBridge  
[125.017861] usb 1-2: Manufacturer: Cypress  
[125.017862] usb 1-2: SerialNumber: 0000000004BE

I read some posts about similar issues but those were very old and with  
the USRP1 devices.

Has anyone got this running with a virtual linux install?

Thanks  
Hari

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<div class="post-metadata">

**Author:** ![hariharan\_g](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/a3d4f5/32.png) [@hariharan\_g](https://www.ruby-forum.com/u/hariharan_g)\
**Post date:** [June 20, 2014, 7:40pm UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-in-parallel-ubuntu-linux/230460/2 "2014-06-20T19:40:33Z")

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Am able to access the B200 now. Noticed that the uhd driver version was  
UHD\_003.005.004-140-gfb32ed16. Uninstalled this and downloaded the  
latest 007 version and reinstalled. Now uhd\_find\_devices is finding the  
B200.

Thanks  
Hari

---

<div class="post-metadata">

**Author:** ![hariharan\_g](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/a3d4f5/32.png) [@hariharan\_g](https://www.ruby-forum.com/u/hariharan_g)\
**Post date:** [June 20, 2014, 7:44pm UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-in-parallel-ubuntu-linux/230460/3 "2014-06-20T19:44:50Z")

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Next hurdle:

root@gnuradio:/opt/uhd-git/host/build# uhd\_usrp\_probe  
linux; GNU C++ version 4.8.2; Boost\_105400; UHD\_003.007.001-78-gdc48e5ea

– Loading firmware image:  
/usr/local/share/uhd/images/usrp\_b200\_fw.hex… done  
– Loading FPGA image: /usr/local/share/uhd/images/usrp\_b200\_fpga.bin…  
done  
– Operating over USB 3.  
Error: AssertionError: accum\_timeout \< \_timeout  
in uint64\_t radio\_ctrl\_core\_3000\_impl::wait\_for\_ack(bool)  
at /opt/uhd-git/host/lib/usrp/cores/radio\_ctrl\_core\_3000.cpp:228

No clue what this is, not sure how to go about fixing this.

Greatly appreciate any help with this.

Thanks  
Hari