RaspberryPiでWifiのUSBドングルと、RTLデバイスを同居させたときに、rtl_testでエラーになってしまう。 $ sudo rtl_test Found 1 device(s): 0: Generic, RTL2832U, SN: XXXXXXXXXXXX Using device 0: Generic RTL2832U 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_in