I am trying to use my USRP 2921 on GNURadio with my computer which uses Ubuntu. I have read that I had to use the block UHD but GRC does not recognise the USRP. When I type "uhd_find_devices" in the terminal, I have the message "No UHD Devices found" despite the fact that my USRP 2921 is connected to the computer with the ethernet cable. I used the command "uhd_images_downloader" in the Terminal but it did not help.
Can somebody help me? Thank you!