I managed to resolve a problem with the install.
Commands, find_usrp_devices and uhd_usrp_probe failed to get my B100 to
respond with the model and daughter board and FPGA information. Yet at
times it would work, albeit very briefly.
Whilst trying to keep this follow up mail brief, the problem was caused
the USB lead I was using. Although a new lead and just 2m in length, it
be unable to handle the bus communications between the USRP and my PC.
However, for the past few months it’s been fine when using my B100 on
Windows 8.1 when casually running SDR# or HDSDR.
Whilst working in Ubuntu, when I ran the lsusb command, the USRP was
This was puzzling, for me anyway, as beyond that the USRP would not
or rather I could not get it to intermittently communicate with my PC,
Whilst switching back to my Windows partition, I checked the USB lead
known working applications in Windows 10; HDSDR and SDR#, since by this
I felt my USRP B100 may have been faulty. My USRP wouldn’t work in those
applications either, though it had previously worked perfectly well on
same now suspect USB lead. The commands, find_usrp_devices and
uhd_usrp_probe on a Windows platform (from Command line) wouldn’t work
the suspect faulty cable attached (the command, uhd_usrp_probe,being
particularly problematic in returning runtime errors).
Again, without going into more tests and irregular driver responses in
Windows 10, with the UHD driver throwing up errors, I changed the USB
with another cable in desperation and the whole system came alive and
remained so over the past day or so.
I swapped the cable with a 1.5m filtered USB cable I’ve owned for years
this confirmed the problem. I swapped it back again, to the suspect
and the irregular functions reoccurred. However, the suspect USB lead
fine with any other equipment I have such as printer and an USB
port. I wasn’t using an expansion USB device when these errors were
occurring BTW, just the suspect one USB lead between the PC and the USRP
All it is left for me to do is now go back to my Ubuntu partition and
reinstall GNURadio again on a fresh install of Ubuntu (as I have done so
many times this past week trying to get it to work) and hopefully get
more positive results.
I will start with Ubuntu 12.04 LTS 64 bit as that was the last known
distro that worked two years ago when running many successful installs
GNURadio on my other PC’s and laptop. This includes successfully
GNURadio on Windows 7 at the time. However, in terms of Ubuntu, I will
use Marcus’s excellent build-gnuradio script, as I did two years ago and
work on from there. I’m hoping Marcus’s script will fetch the required
dependencies and build to a successful outcome this time around again.
Else, if you can advise on any other approach to installing GNURadio, on
more recent Ubuntu distro’s, so that it will also reliably work with my
USRP, I should be grateful again for your help. I really want to learn
work with GNURadio so that I can better understand its function since
various academic commitments I have had so little time over the past
of years and more since investing in the Ettus USRP concept back in
Again, your patient help is very much appreciated.