Re: [Discuss-gnuradio] RTL SDR & GNU Radio new linux machine.

[Paul Zander]

I too am lost in an obstacle course in getting RTL_SDR to work. 

Background:

1.  The hardware worked with windows and SDR#.    Audio in the speakers on the first try.

2.  I first tried the GNURadio v3.7.10.1 as a live .iso.  PLL not locked

3.  Then I installed Debian Stretch and downloaded the packages. 

     
I have also installed /etc/modprobe.d/rtl_blacklist.conf and /etc/udev/rules.d/rtl-sdr.rules.

=== GRC 3.7.10 ===

Executing: /usr/bin/python -u /DATA/GNUradio/myProjects/RTL/top_block.py

linux; GNU C++ version 6.2.0 20160822; Boost_106100; UHD_003.009.005-0-unknown

gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.10
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
Found Rafael Micro R820T tuner
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Exact sample rate is: 2000000.052982 Hz
[R82XX] PLL not locked!
gr::log :INFO: audio source - Audio sink arch: alsa
aUaUaUaUaUaUaUaUaUaUaUaUaUaUaU

=== rtl_test ===

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

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.

Info: This tool will continuously read from the device, and report if
samples get lost. If you observe no further output, everything is fine.

Reading samples in async mode...
lost at least 208 bytes

=== rtl_fm ===

$ rtl_fm -f 88.5M -M wbfm  | aplay
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Tuner gain set to automatic.
Tuned to 88771000 Hz.
Oversampling input by: 6x.
Oversampling output by: 1x.
Buffer size: 8.03ms
Exact sample rate is: 1020000.026345 Hz
Playing raw data 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
Sampling at 1020000 S/s.
Output at 170000 Hz.

---

From: Cinaed Simson <address@hidden>
To: address@hidden
Sent: Sunday, October 23, 2016 9:16 PM
Subject: Re: [Discuss-gnuradio] RTL SDR & GNU Radio new linux machine.

On 10/23/2016 04:35 PM, address@hidden wrote:
> Hi,
>
> I just built Gnu Radio from source on a new/fresh linux machine (Ubuntu
> 16)
>
> For some reason, my RTL-SDR device cannot be opened.
>
> I get this error:
>
> usb_claim_interface error -6

Try installing the enclosed file in

  /etc/modprobe.d/rtl-blacklist.conf

It's most likely the kernel is loading the driver for a rtl ethernet
card preventing the driver for the rtl dongle from being loaded.

Blacklisting the driver for the rtl dongle prevents the kernel from
trying to load its rtl driver when the dongle is connected.

You may have to reboot.

Also, check to see if the file

  /etc/udev/rules.d/rtl-sdr.rules

exists.

And type

  groups

and make sure you're a member of the group

  usb

-- Cinaed

>
> 1) The device is present, it shows in dmesg
>
> 2) I do not think it is a udev permissions error -
> a) the rules are installed in /dev/udev/rules.d/15-rtl-sdr.rules
> b) Running GnuRadio as ROOT - has the same result.
>
> 3) Also Running any of the RTL tool commands have the same errors.
>
> tried this: http://gnuradio.org/redmine/issues/659 - become root as
> workaround - does not help
>
> 4) I do see the device:  /dev/swradio0 - show up
>
> 5) DMESG output is below
>
> My hunch is this:
>    Something is grabbing the interface
>    And that is stopping GNU radio from using it.
>
> Sort of stuck.... Any suggestions?
>
> ========================
> address@hidden:~$ dmesg
> [ 1390.155412] usb 3-7: new high-speed USB device number 14 using
> xhci_hcd
> [ 1390.351122] usb 3-7: New USB device found, idVendor=0bda,
> idProduct=2838
> [ 1390.351132] usb 3-7: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [ 1390.351138] usb 3-7: Product: RTL2838UHIDIR
> [ 1390.351144] usb 3-7: Manufacturer: Realtek
> [ 1390.351149] usb 3-7: SerialNumber: 00000001
> [ 1390.358518] usb 3-7: dvb_usb_v2: found a 'Realtek RTL2832U reference
> design' in warm state
> [ 1390.411917] usb 3-7: dvb_usb_v2: will pass the complete MPEG2
> transport stream to the software demuxer
> [ 1390.411928] DVB: registering new adapter (Realtek RTL2832U reference
> design)
> [ 1390.415941] i2c i2c-6: Added multiplexed i2c bus 7
> [ 1390.415945] rtl2832 6-0010: Realtek RTL2832 successfully attached
> [ 1390.415950] usb 3-7: DVB: registering adapter 0 frontend 0 (Realtek
> RTL2832 (DVB-T))...
> [ 1390.416003] r820t 7-001a: creating new instance
> [ 1390.427516] r820t 7-001a: Rafael Micro r820t successfully identified
> [ 1390.428198] rtl2832_sdr rtl2832_sdr.1.auto: Registered as swradio0
> [ 1390.428211] rtl2832_sdr rtl2832_sdr.1.auto: Realtek RTL2832 SDR
> attached
> [ 1390.428212] rtl2832_sdr rtl2832_sdr.1.auto: SDR API is still slightly
> experimental and functionality changes may follow
> [ 1390.434674] Registered IR keymap rc-empty
> [ 1390.434714] input: Realtek RTL2832U reference design as
> /devices/pci0000:00/0000:00:14.0/usb3/3-7/rc/rc0/input26
> [ 1390.434794] rc0: Realtek RTL2832U reference design as
> /devices/pci0000:00/0000:00:14.0/usb3/3-7/rc/rc0
> [ 1390.435000] rc rc0: lirc_dev: driver ir-lirc-codec (dvb_usb_rtl28xxu)
> registered at minor = 0
> [ 1390.435044] input: MCE IR Keyboard/Mouse (dvb_usb_rtl28xxu) as
> /devices/virtual/input/input27
> [ 1390.435158] usb 3-7: dvb_usb_v2: schedule remote query interval to
> 200 msecs
> [ 1390.451269] usb 3-7: dvb_usb_v2: 'Realtek RTL2832U reference design'
> successfully initialized and connected
> address@hidden:~$ lf /dev/swradio0
> crw-rw-rw-+ 1 root video 81, 0 Oct 23 16:29 /dev/swradio0
> address@hidden:~$
> ========================
>
> -Duane.
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio