Ubuntu 12.04 B100 issues

GNU Radio
1

Hi,

Is anyone successfully using a B100 with Ubuntu 12.04? I rebuilt a
system recently and now I am continually getting seg faults and “Got a
data packet with unknown SID” errors on my Z77 based Ubuntu system.

I’m using the build-gnu-radio script and it’s grabbed the latest uhd
images. I have a rtl-sdr like device which seems to be working fine but
attempting to run say the uhd_fft gives me;
UHD Error:
Got a data packet with unknown SID 6553599

UHD Error:Segmentation fault (core dumped)

dmesg shows;
[ 2722.100287] uhd_fft[6089]: segfault at 220 ip 00007f902ead12db sp
00007fff181949c0 error 4 in i965_dri.so[7f902ea66000+c2000]

I checked the archives and someone mention it could be related to the
version of libusb? Is there any particular versions of libusb i should
be using?

Thanks for the help.

Bill

2

I checked the archives and someone mention it could be related to the
version of libusb? Is there any particular versions of libusb i should
be using?

hmm… can you try the uhd’s next branch? There was some bus work to
add a feature, in case there was a bus issue, this will do the trick.

_josh

3

On 8/3/2012 4:00 AM, bmod wrote:

Hi,

Is anyone successfully using a B100 with Ubuntu 12.04? I rebuilt a
system recently and now I am continually getting seg faults and “Got a
data packet with unknown SID” errors on my Z77 based Ubuntu system.

I’m using 12.04. It works fine for me. The only real change I made from
the baseline 12.04 is I changed my desktop environment to XFCE. I use
the build-gnuradio script to build everything

http://www.sbrac.org/files/build-gnuradio

I do get the unknown SID error but only when my application crashes. But
that has always been due to a problem with my application.

stephen

4

On 8/4/2012 12:41 PM, Josh B. wrote:

I do get the unknown SID error but only when my application crashes. But
that has always been due to a problem with my application.

Thats a good point. I’m always second guessing myself :slight_smile:

It would be nice if there was a software way to reset that. When I start
getting the error I have to cycle power on my usrp.

stephen

5

On 08/04/2012 01:16 PM, Stephen wrote:

I’m using 12.04. It works fine for me. The only real change I made from
the baseline 12.04 is I changed my desktop environment to XFCE. I use
the build-gnuradio script to build everything

http://www.sbrac.org/files/build-gnuradio

I do get the unknown SID error but only when my application crashes. But
that has always been due to a problem with my application.

Thats a good point. I’m always second guessing myself :slight_smile:

dmesg shows;
[ 2722.100287] uhd_fft[6089]: segfault at 220 ip 00007f902ead12db sp
00007fff181949c0 error 4 in i965_dri.so[7f902ea66000+c2000]

looks like a graphics related segfault, Unknown SID is a the result of
interpreting junk buffers from the USB. I guess, you can expect bad
things to happen to the other process threads after a segfault

-josh

6

yeah sorry about that, looks like it is an issue with the onboard
graphics not the b100.