# Re: FATAL: No supported device found

**URL:** <https://www.ruby-forum.com/t/re-fatal-no-supported-device-found/233812>\
**Category:** GNU Radio\
**Created:** [January 14, 2015, 1:56pm UTC](https://www.ruby-forum.com/t/re-fatal-no-supported-device-found/233812 "2015-01-14T13:56:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [January 14, 2015, 1:56pm UTC](https://www.ruby-forum.com/t/re-fatal-no-supported-device-found/233812/1 "2015-01-14T13:56:06Z")

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* * *

Discuss-gnuradio mailing list  
removed\_email\_address@domain.invalid  
[https://lists.gnu.org/mailman/listinfo/discuss-gnuradio](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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**Author:** ![andreas\_l](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7bcc69/32.png) [@andreas\_l](https://www.ruby-forum.com/u/andreas_l)\
**Post date:** [January 14, 2015, 4:39pm UTC](https://www.ruby-forum.com/t/re-fatal-no-supported-device-found/233812/2 "2015-01-14T16:39:43Z")

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On 01/14/2015 07:54 AM, Andreas L. wrote:

> ```
> ===============
> 
> I could see the device with dmesg and the rtl_test / rtl-test -t
> 
> ```
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)  
> Which build script did you use? build-gnuradio? It definitely _does_  
> build-and-install librtlsdr prior to build gr-osmosdr, but if that fails  
> for some reason,  
> gr-osmosdr will get built.

If you re-run it with “-v” it will give you more verbose output.

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**Author:** ![andreas\_l](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7bcc69/32.png) [@andreas\_l](https://www.ruby-forum.com/u/andreas_l)\
**Post date:** [January 14, 2015, 6:55pm UTC](https://www.ruby-forum.com/t/re-fatal-no-supported-device-found/233812/3 "2015-01-14T18:55:46Z")

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Hi Bananpi,

On some Linux distributions the RTL dongle USB can be grabbed by other  
applications  
at boot time, leaving it not available when you use gnuradio. If that is  
your issue it may  
be resolved by blacklisting the RTL device.

Modify or create a file: etc/modprobe.d/rtlsdr.conf

and add:

blacklist dvbusbrt128xxu  
blacklist e4000  
blacklist rtl2832

Then reboot.

– Tom, N5EG