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Re: [Discuss-gnuradio] gqrx segfaults: rtlsdr_read_async returned with -


From: M Dammer
Subject: Re: [Discuss-gnuradio] gqrx segfaults: rtlsdr_read_async returned with -5
Date: Fri, 21 Mar 2014 16:41:44 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0

I updated from a gnuradio 3.7.3 git version (before 3.7.3 was officially
released). I updated the pybombs recipes via git before the update.
"Pybombs update" removed all updateable gnuradio stuff and installed it
new as expected.
I can actually confirm the problem now on two machines. Both running
XUbuntu 12.04 64bit. One with an Intel core 2 due and the other with an
AMD "APU" processor. I usually had no problems running gnuradio, gqrx
and other related applications on both machines.
Can you explain what that rtlsdr_read_async... message means ?

Mark

On 21/03/14 16:25, Tom Rondeau wrote:
> On Fri, Mar 21, 2014 at 12:20 PM, M Dammer <address@hidden> wrote:
>> I have updated my gnuradio installation via pybombs today.
>> Gqrx is no longer working with my RTL-SDR dongle. The gui loads, but the
>> moment when I start the receiver it works for about a second and then it
>> crashes with:
>> rtlsdr_read_async returned with -5
>> Segmentation fault (core dumped)
>>
>> I tried different sample rates, but I cannot get it work. To be on the
>> safe side I rebuilt gr-iqbal and gr-osmosdr and then gqrx, but that does
>> not fix it. Other applications (gr-air-modes) work well with the new
>> build and do not crash.
>>
>> Here is a complete dump of a session:
>> address@hidden:~/apps/gnuradio/3.7$ gqrx
>> linux; GNU C++ version 4.6.3; Boost_105300; UHD_003.007.000-1-ga8caec5f
>>
>> gr-osmosdr v0.1.0-78-g1e8b45d0 (0.1.1git) gnuradio v3.7.4git-35-g1092e685
>> built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf rfspace
>> airspy
>> Using Volk machine: sse4_a_64_orc
>> gr-osmosdr v0.1.0-78-g1e8b45d0 (0.1.1git) gnuradio v3.7.4git-35-g1092e685
>> built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf rfspace
>> airspy
>> Using device #0 Realtek RTL2838UHIDIR SN: 00000013
>> Found Rafael Micro R820T tuner
>> Exact sample rate is: 1500000.014901 Hz
>> rtlsdr_read_async returned with -5
>> Segmentation fault (core dumped)
>>
>> tnx for any help,
>> Mark
> Mark,
>
> Updated from what previous version?
>
> What's your system (OS, processor)?
>
> Tom






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