Gr-gsm Livemon not working properly

[justicexxx]

I've using Kali linux I tested my RTL2832U device. Although I did everything right I can't find the find the frequencies

[velichkov]

Hi @justicexxx,

Are you sure that there are an active GSM cell on the selected frequency (945.8MHz)? Have you tried scanning all frequencies using grgsm_scanner? Also make sure that in the country where you live there are GSM cells in the supported frequency bands. Do you have an antenna attached to your RTL dongle? In case you are testing inside of a big building try moving near a window or outside.

Have you tried googling the error message you are seeing in the terminal?

P.S. Please next time copy-paste the text from the terminal and do not attach screenshots.

[justicexxx]

Thanks for your answer. I don't know much about Linux, I'm just getting started. My device has an antenna installed. I tried "grgsm_scanner" command but nothing happened. I live in Turkey.

[justicexxx]

My device is here: https://tr.aliexpress.com/item/1005001855403405.html?spm=a2g0s.9042311.0.0.aa3c4c4dAAPbwe

[velichkov]

rtlsdr_demod_write_reg failed with -9

First you need to fix this error. Run rtl_test -p and provide the output. If you see the above error try connecting your dongle to a different USB port. In case you are using an USB hub try connecting it directly.

Also run grgsm_scanner --debug and provide 30 or so lines of the output.

[justicexxx]

I rtl_test -p I tested the code, that's the case Also the result of grgsm_scanner --debug debug is like this

└─# rtl_test -p Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Found Fitipower FC0012 tuner Supported gain values (5): -9.9 -4.0 7.1 17.9 19.2 Sampling at 2048000 Srtl_test -p I tested the code, that's the case Also the result of grgsm_scanner --debugdebug is like this /s. Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. Reading samples in async mode... Allocating 15 zero-copy buffers lost at least 452 bytes lost at least 292 bytes lost at least 324 bytes lost at least 12 bytes lost at least 100 bytes real sample rate: 1897101 current PPM: -73681 cumulative PPM: -73681 lost at least 364 bytes lost at least 104 bytes

└─# grgsm_scanner --debug

Args= [INFO] [UHD] linux; GNU C++ version 10.2.1 20201207; Boost_107400; UHD_3.15.0.0-4+b1 [ERROR] SoapySDR::loadModule(/usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so) dlopen() failed: /usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so: undefined symbol: _ZN5boost6chrono12steady_clock3nowEv [ERROR] avahi_service_browser_new() failed: Bad state Found Fitipower FC0012 tuner gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.2.0 built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp Using device #0 Realtek RTL2838UHIDIR SN: 00000001 Found Fitipower FC0012 tuner Exact sample rate is: 2000000.052982 Hz Allocating 15 zero-copy buffers rtlsdr_demod_write_reg failed with -9 Args= [ERROR] avahi_service_browser_new() failed: Bad state Hash collision!!! Fatal error!!

[velichkov]

lost at least 452 bytes lost at least 292 bytes

Your computer is not able to process the incoming data (samples) fast enough. You'll need a better/faster computer. Are you running this in a Virtual Machine?

Allocating 15 zero-copy buffers rtlsdr_demod_write_reg failed with -9

Have you tried a different USB port? Do you use USB hub?

[justicexxx]

Thanks for answer

I tried another front usb port and got this error
└─# grgsm_scanner --debug

Args= [INFO] [UHD] linux; GNU C++ version 10.2.1 20201207; Boost_107400; UHD_3.15.0.0-4+b1 [ERROR] SoapySDR::loadModule(/usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so) dlopen() failed: /usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so: undefined symbol: _ZN5boost6chrono12steady_clock3nowEv [ERROR] avahi_service_browser_new() failed: Bad state Found Fitipower FC0012 tuner gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.2.0 built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp Using device #0 Realtek RTL2838UHIDIR SN: 00000001 Found Fitipower FC0012 tuner Exact sample rate is: 2000000.052982 Hz Allocating 15 zero-copy buffers rtlsdr_demod_write_reg failed with -9 Args= [ERROR] avahi_service_browser_new() failed: Bad state Hash collision!!! Fatal error!!

------But this time there is no lost bytes. Like this------

ound 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Found Fitipower FC0012 tuner Supported gain values (5): -9.9 -4.0 7.1 17.9 19.2 Sampling at 2048000 S/s. Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. Reading samples in async mode... Allocating 15 zero-copy buffers lost at least 128 bytes real sample rate: 2046920 current PPM: -527 cumulative PPM: -527 real sample rate: 2046971 current PPM: -502 cumulative PPM: -514

And so on...

[justicexxx]

lost at least 452 bytes lost at least 292 bytes

Your computer is not able to process the incoming data (samples) fast enough. You'll need a better/faster computer. Are you running this in a Virtual Machine?

Allocating 15 zero-copy buffers rtlsdr_demod_write_reg failed with -9

Have you tried a different USB port? Do you use USB hub? My comp. fast enough for this VM. I have 12 threads 32 Gb Ram fast comp. I use Virtual box 4 threads and 4gb RAM

[velichkov]

Are you running this in a Virtual Machine?

rtlsdr_demod_write_reg failed with -9

Have you tried a different USB port? Do you use USB hub?

My comp. fast enough for this VM. I have 12 threads 32 Gb Ram fast comp. I use Virtual box 4 threads and 4gb RAM

Although it should be possible to run gr-gsm in a VM you may face all sorts of USB performance related issues. As you are novice Linux user my recommendation is to install Linux on a dedicated hardware.

Hash collision!!! Fatal error!!

This error is printed from hamlib. Do you have the hamlib package installed and can you try removing it?

Another possible workaround is to always specify the SDR device in the --args parameter

grgsm_scanner --args=rtl --debug

[velichkov]

This error is printed from hamlib. Do you have the hamlib package installed and can you try removing it?

The correct package name is libhamlib4 so you need to execute

sudo apt-get remove libhamlib4

[justicexxx]

rtl_test -p resuls

rtl_test -p

Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Detached kernel driver Found Fitipower FC0012 tuner Supported gain values (5): -9.9 -4.0 7.1 17.9 19.2 Sampling at 2048000 S/s. Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. Reading samples in async mode... Allocating 15 zero-copy buffers lost at least 60 bytes real sample rate: 2047274 current PPM: -354 cumulative PPM: -354 real sample rate: 2047008 current PPM: -484 cumulative PPM: -422 real sample rate: 2046950 current PPM: -512 cumulative PPM: -453 ^[[A^[[A^[[A^[[A^[[A^[[Areal sample rate: 2046877 current PPM: -548 cumulative PPM: -477 real sample rate: 2047154 current PPM: -413 cumulative PPM: -464 real sample rate: 2047052 current PPM: -463 cumulative PPM: -464 real sample rate: 2044983 current PPM: -1473 cumulative PPM: -610 real sample rate: 2049080 current PPM: 527 cumulative PPM: -466 real sample rate: 2047154 current PPM: -413 cumulative PPM: -460 real sample rate: 2046881 current PPM: -546 cumulative PPM: -469 real sample rate: 2046940 current PPM: -517 cumulative PPM: -473 real sample rate: 2047178 current PPM: -401 cumulative PPM: -467 real sample rate: 2047122 current PPM: -428 cumulative PPM: -464

... and so on

And here is grgsm_scanner --debug Results

┌──(root💀kali)-[~] └─# grgsm_scanner --debug

Args= [INFO] [UHD] linux; GNU C++ version 10.2.1 20201207; Boost_107400; UHD_3.15.0.0-4+b1 [ERROR] SoapySDR::loadModule(/usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so) dlopen() failed: /usr/lib/x86_64-linux-gnu/SoapySDR/modules0.7/librfspaceSupport.so: undefined symbol: _ZN5boost6chrono12steady_clock3nowEv [ERROR] avahi_service_browser_new() failed: Bad state Found Fitipower FC0012 tuner gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.2.0 built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp Using device #0 Realtek RTL2838UHIDIR SN: 00000001 Found Fitipower FC0012 tuner Exact sample rate is: 2000000.052982 Hz Allocating 15 zero-copy buffers rtlsdr_demod_write_reg failed with -9 Args= [ERROR] avahi_service_browser_new() failed: Bad state Hash collision!!! Fatal error!!

┌──(root💀kali)-[~] └─# 1 ⨯

[justicexxx]

Also I tried this apt-get update apt-get upgrade apt-get install --reinstall libbladerf1 But not worked.

[velichkov]

Also I tried this apt-get update apt-get upgrade apt-get install --reinstall libbladerf1 But not worked.

What about

sudo apt-get remove libhamlib4