Re: [Discuss-gnuradio] GNU Radio Companion QT GUI Window Quit Immediately

[Tom Rondeau]

On Fri, Jan 23, 2015 at 8:33 PM, xu shunyi <address@hidden> wrote:

Hi,

I am new to GNU Radio, so I built a FM receiver to get started on the journey. I created the following .grc file, and when I clicked <<Execute>>, I saw the QT GUI window pop up and exit immediately. The sound came out only for less than a second and disappeared as the window sank. I've researched this problem in this forum awhile, and someone suggested it's probably due to multiple versions of gnuradio installed. But I cleaned everything related to uhd and gnuradio in my /usr/local directories, and reinstalled via the script "build-gnuradio", it still didn't work. So could you confirm with me whether this is the reason of my problem, and if so, where can I check to find the conflicted version? And what do you suggest me do?

I can do uhd_fft successfully, which opens up a window and never quit.

I am using ubuntu 14.04, usrp b210. I used "build-gnuradio" to install everything. It turned out that grc is 3.7.6.1, with uhd being 3.8.1     

Here's the output of doing <<Execute>>. It ended with "DONE", and windows quit

---------------------------------------------------------------------

linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.001-105-g91ae742f

-- Loading firmware image: /usr/local/share/uhd/images/usrp_b200_fw.hex... done

-- Loading FPGA image: /usr/local/share/uhd/images/usrp_b210_fpga.bin... done

-- Operating over USB 3.

-- Detecting internal GPSDO.... No GPSDO found

-- Initialize CODEC control...

-- Initialize Radio control...

-- Performing register loopback test... pass

-- Performing register loopback test... pass

-- Performing CODEC loopback test... pass

-- Performing CODEC loopback test... pass

-- Asking for clock rate 32.000000 MHz... 

-- Actually got clock rate 32.000000 MHz.

-- Performing timer loopback test... pass

-- Performing timer loopback test... pass

-- Setting master clock rate selection to 'automatic'.

-- Successfully tuned to 107.300000 MHz

-- 

Using Volk machine: avx_64_mmx_orc

>>> Done

----------------------------------------------------------------------

Hi Xu,

Sorry for the delay on this one; I recognized the error but I really thought that we had already patched it. I've just pushed a fix for it that we'll get merged into GNU Radio soon. It was a stray (old) call to the aligned version of a VOLK kernel in SpectrumGUIClass.

Tom