[USRP-users] USB problems

Vsr Ravi vsr_ravi at yahoo.com
Tue Jul 28 18:01:09 EDT 2015

I see that the libuhd, libuhd003 and uhd-host packages have been installed from the software center but the uhd folder has not been installed. So can you please suggest me as to what I can do further. Sorry for this as I am new to using this USRP .

     On Tuesday, 28 July 2015 4:48 PM, Marcus Müller <marcus.mueller at ettus.com> wrote:

  Don't go around deleting arbitrary folders!
 That UHD got there some way -- either from a previous run of building and installing UHD, or via the package manager of your linux.
 If the latter is the case, that's exactly the way it should be removed.
 Please check that no uhd, libuhd, libuhd3 or uhd-host packages are installed.
 Best regards,
 PS: on unix systems, program/libraries and user data is typically kept isolatedly, so don't worry about losing any work.
 On 28.07.2015 23:43, Vsr Ravi wrote:
  Hi Marcus, Thanks for the reply. I guess I need to delete one UHD folder. Is it possible to delete any UHD folder, or will be the information be lost if I perform this operation on any of the folder of UHD? 
  Regards, Ravi 
       On Tuesday, 28 July 2015 4:34 PM, Marcus Müller <marcus.mueller at ettus.com> wrote:
    Hi Ravi,
 you seem to have two different, competing UHD installations, one in /usr/local/, and one in /usr/.
 Make sure you only have one. Again, it's important that you remove all other UHDs from your system before you install your self-built UHD.
 Best regards,
  On 28.07.2015 23:31, Vsr Ravi wrote:
     Hi, Thanks for the suggestions that you have given. But I have encountered a  problem. Whenever I run the file of Latency_test located in /usr/lib/uhd/examples, I get the  error as 
  Error: LookupError: IndexError: multi_usrp::mb_root(140725369489696) - vector::_M_range_check
  And when I run "test_messages" command, it shows  
  Segmentation fault (core dumped)
  Please suggest as to what I can do to prevent the above errors. Thank you  
  Regards, Ravi 
          On Tuesday, 28 July 2015 4:28 AM, Marcus Müller <marcus.mueller at ettus.com> wrote:
    Hi Ravi,
  On 28.07.2015 00:55, Vsr Ravi wrote:
      Hey all, I have tried to run the USRP1 by giving the command "sudo uhd_usrp_probe  and I get the result as below. 
    linux; GNU C++ version 4.8.4; Boost_105500; UHD_003.009.git-144-g407e3086 
  -- Opening a USRP1 device... -- Loading FPGA image: /usr/local/share/uhd/images/usrp1_fpga.rbf... done       
  Can anyone please tell what this means and what do I do next as I am new to  gnuradio. Thanks        
 As Martin said: Both your USRP as your UHD installation work pretty well!
 The only thing is that you need to run it as root (the sudo part), and that's not a good thing.
 Can you make sure that /etc/udev/rules.d/ contains the uhd.rules file[1]? If not, copy it over from /usr/local/lib/uhd/utils/uhd-usrp.rules, e.g. like
 sudo cp /usr/local/lib/uhd/utils/uhd-usrp.rules /etc/udev/rules.d/
 and then reboot.
 The next time you plug in your USRP, it should no longer be only accessible by root.
 Best regards,
 [1] You said earlier you did
 cd usr/lib/uhd/utils
sudo cp uhd-usrp.rules /etc/udev/rules.d/
sudo udevadm control --reload-rules
sudo udevadm trigger but that's not the right path, if uhd is installed to /usr/local/... 

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