Unable to open RF frontend device

[andyraf]

I've been tearing my hair out trying to get LTESniffer to work but get this message. This is with dual USRP B200 devices, neither of which has a GPS, so I expect the "no gpsdo detected" errors, but not the Failed to open a RF frontend device:

$ sudo ./src/LTESniffer -A 1 -W 2 -f 619.5e6 -u 665.5e6 -C -m 1

LTESniffer

Thu_Sep_26_22.14.21_2024. Creating Phy Creating 2 Worker threads Opening RF device with 1 RX antennas... Available RF device list: UHD Trying to open RF device 'UHD' [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.0.0.0-240-gb38c9d83 [INFO] [LOGGING] Fastpath logging disabled at runtime. Opening USRP channels=1, args: num_recv_frames=512,recv_frame_size=8000,serial=3288FD4,type=b200,master_clock_rate=23.04e6 [INFO] [UHD RF] RF UHD Generic instance constructed [INFO] [B200] Detected Device: B200 [INFO] [B200] Operating over USB 2. [INFO] [B200] Initialize CODEC control... [INFO] [B200] Initialize Radio control... [INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed [INFO] [B200] Asking for clock rate 23.040000 MHz... [INFO] [B200] Actually got clock rate 23.040000 MHz. /home/andyraf/src/LTESniffer/build/srsRAN-src/lib/src/phy/rf/rf_uhd_imp.cc:931: uhd_init failed, freeing... [ERROR] [UHD RF] LookupError: KeyError: update_clock_source: gpsdo selected, but no gpsdo detected! Unable to open RF device 'UHD' /home/andyraf/src/LTESniffer/build/srsRAN-src/lib/src/phy/rf/rf_imp.c:145: Failed to open a RF frontend device. Please check the available srsRAN CMAKE options to verify what RF frontend devices have been detected in your system Error opening rf_a

At this point LTESniffer hangs.

This is with the latest LTESniffer-multi-usrp building with a clean Ubuntu 22.04.5 LTS OS. I've entered my serial #s into LTESniffer_Core.cc, rerun all the install/build steps, and tried building multiple branches of UHD (4.0, 4.1, 4.7) but all yield the same result. uhd_find_devices works fine:

$ sudo uhd_find_devices [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.0.0.0-240-gb38c9d83

-- UHD Device 0

Device Address: serial: 3288FD4 name: MyB200 product: B200 type: b200

---

-- UHD Device 1

Device Address: serial: 3304BED name: MyB200 product: B200 type: b200

Any suggestions of where to look next?