I've recently installed rts-sdr on my pi and regardless of what I do I get the following:
I've tried to blacklist the kernel with:
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pi@pi32 ~ $ rtl_test -t Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Kernel driver is active, or device is claimed by second instance of librtlsdr. In the first case, please either detach or blacklist the kernel module (dvb_usb_rtl28xxu), or enable automatic detaching at compile time. usb_claim_interface error -6 Failed to open rtlsdr device #0.
in /etc/modprobe.d/blacklist but to no effect. (This might be completely wrong and I would not have a clue given that I'm a linux ignoramus.)
As for checking if the device has been claimed by a second instance of librtlsdr I have no idea what that even means.
The frustrating thing is that I had it working last year and I must have written over the image. It does tell me though that my hardware is ok and that there is something in software that is not working.
Any ideas... anyone?