Dear USRP-Users, I am trying to establish a connection from my laptop (ThinkPad P53) to an X440, initially, via 1G ethernet cable, but uhd_find_devices, or uhd_usrp_probe fail despite bring able to ping the device.
* Preamble I have a USRP-2954 and have had no problem operating this, via the same 1G ethernet cable (with 10GB RJ45 to FSP+ adaptor). I have used Ubuntu 22.04 and 24.04.1 with both building from source and directly apt installing the binaries, able to find success with uhd_find_devices afterwards. A difference between the USRP-2954 and X440 is that the USRP-2954 uses a fixed IP address (192.168.40.2) where are Eth0 on the X440 is configured to use a DHCP-assigned IP address. For a while I have experimented with network settings on the host laptop, with varying levels of insight gained, but never able to get a response recognised from uhd_find_devices with the X440. * Ubuntu 24.04.1 | apt install libuhd-dev uhd-host After installation and verification, and expecting uhd_find_devices to work with 1G Ethernet connection, it fails. I attempted permutating ubuntu network settings to establish a connection. Only with the 'shared to other computers' option does ubuntu declare a connection has been established. From this, with wireshark I can confirm communication from the X440 via its serial number and mac address, and find its ip address (10.42.0.159). I can ping the device with 'shared to other computers' or with a fixed address set on the computer as 10.42.0.1. I cannot however ssh into the device, or get a valid response from uhd_find_devices / uhd_usrp_probe with known arguments queried. Connecting the laptop to the 'PS to USB' usb-c port, I expect to see a new usb device recognised on the laptop with lsusb, lsblk, ls -lash /dev/tty*, but never does the number of connections change after powering cycling the device while connected in this way. This was my hope through after finding https://forums.ni.com/t5/USRP-Software-Radio/Unable-to-find-usrp-devices-for-USRP-X440-RJ45-ethernet/td-p/4354614 * Ubuntu 24.04.1 | building 4.7.0.0 from source I installed all dependencies in both https://files.ettus.com/manual/page_build_guide.html (only without libcurses5 and libcurses5-dev) and https://kb.ettus.com/Building_and_Installing_the_USRP_Open-Source_Toolchain_(UHD_and_GNU_Radio)_on_Linux (24.04 version). In the cmake stage, I notice that it failed to find modules gevent, mprpc, pyudev and pyroute2. Previously I had included this (aside mprpc) with similar outcome. After completing the build, I can ping the device successfully (ICMP Echo ping request and reply) with fixed ip set, but attempting uhd_usrp_probe with this yeilds Destination unreachable. * Additional notes With each attempt I turn firewall off, via ufw and iptables, as I am on a closed network. >From the Ettus's X440 Getting Started Guide, "Note that if you are operating >the device in Network Mode, the version of UHD running on the host computer >and the USRP X4x0 must match". With this I need to make sure the UHD versions are matching. However with no way found so far to access the X440 to check its UHD version, I have tried all versions since 4.5.0.0 not including release candidates. I will be doing this with release candidates with Ubuntu 20 in the mean time, and will update if I have success with this. * Summary Cannot connect to X440 via 1G ethernet, aside ping responses with fixed ip address. Cannot recognise the X440 as a usb device required to access the filesystems directly on the device. To establish a connection from this as a starting point via networking configuration, are there any suggestions? To restart the setup from a fresh ubuntu installation, is there anything I should change that may improve my chances? It is possible I have missed some crucial dependencies for the X440 specifically? I have saved all logs for the build process and can share these. Scenere thanks for any and all guidance, Dan
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