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I've installed the gqrz application (for software defined radio) and get the following response:

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$ gqrx
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.10.5.1
built-in source types: file fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya
Resampling audio 96000 -> 48000
BandPlanFile is /home/hoyt/.config/gqrx/bandplan.csv
BookmarksFile is /home/hoyt/.config/gqrx/bookmarks.csv
[INFO] [UHD] linux; GNU C++ version 12.2.1 20230128; Boost_108100; UHD_4.4.0.0-0-unknown
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.10.5.1
built-in source types: file fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya
Using device #0 Generic RTL2832U OEM
usb_open error -3
Please fix the device permissions, e.g. by installing the udev rules file rtl-sdr.rules
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.10.5.1
built-in source types: file fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya
WARNING: Overriding original sample rate of 96000 with 1.8e+06

I have installed the udev rules file rtl-sdr.rules file in /etc/udev/rules.d/

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# RTL2832U OEM vid/pid, e.g. ezcap EzTV668 (E4000), Newsky TV28T (E4000/R820T), ‎NESDR SMArt v5 etc.
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", ENV{ID_SOFTWARE_RADIO}="1", MODE="0660", GROUP="plugdev"

The device itself is:

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$lsusb
...
Bus 001 Device 003: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
...

So it appears the device permissions cannot be initialized even though the udev rule exists.

In case it matters:

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$ uname -a
Linux zeus.maximumhoyt.com 6.6.28-desktop-1.mga9 #1 SMP PREEMPT_DYNAMIC Wed Apr 17 17:19:36 UTC 2024 x86_64 GNU/Linux

What to do?

Well, what are the actual permissions of the USB device? Also is your user in the group plugdev ?

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ls -al /dev/bus/usb


Also the following would help to show all the udev attributes for the device and the nodes above the device

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udevadm info --attribute-walk --name=/dev/path/to/USB/device

Thank you for the quick reply!

ls -al /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189, 256 Apr 28 03:31 /dev/bus/usb/003/001

There is no group plugdev.

There is no group plugdev.

Upon re-reading this, I added the group plugdev and the device appears to be working although I'm getting some .

Should not installing the gqrs package create that group? I can file a bug report about that if necessary.

Also, it seems necessary to have gnuradio installed which is not a dependency of gqrx. I can file a bug report about that if necessary.

So, for this issue, I can mark it as SOLVED and continue troubleshooting other issues.

Thanks for pointing me in teh right direction.

hduff wrote:Should not installing the gqrs package create that group? I can file a bug report about that if necessary.

Also, it seems necessary to have gnuradio installed which is not a dependency of gqrx. I can file a bug report about that if necessary.

Well, if it doesn't work out of the box, you should probably report it, IMHO you can also report both issues in one bug against gqrx.

I'll do a re-install from scratch and see if those issues remain.



removed quote. ~Germ