Hi, This looks like a bug in UHD 4.0.0.0 that has been fixed but not yet released:
https://github.com/EttusResearch/uhd/issues/380 I think that leaves you a few options for workarounds that don't involve switching your distribution: 1) Compile UHD from source with a patch from the commit linked in that bug. 2) Ditch the Manjaro package and use an alternative package (e.g. conda, which still uses UHD 3.15: https://wiki.gnuradio.org/index.php/CondaInstall) 3) Get in contact with the Manjaro / Arch UHD maintainer and get them to update UHD with the patch. Cheers, Ryan On 4/2/21 3:18 AM, Thomas Lavarenne wrote:
Hello, I have a problem with my usrp b200 at high sample rates (> 6M) connected to USB (2 or 3). Whatever the frequency, the signals on the QT frequency sink "do not move". the computer is not frozen, I can still interact with the window, but the signal just freeze. Everything works fine at a sample rate of 4M or below. I don't think this is a problem with the usrp as it does the same with the hackrf. My GNU Radio version is 3.8.2.0 (python 3.9.2) and I have just switched from ubuntu 20.04 to Manjaro (Arch based) and as everything worked well with ubuntu with the same configuration and the same computer (usrp with sampling frequency> 40M without problem) I suspect a problem with the Manjaro OS? Does anyone here use Manjaro / Arch and has encountered a similar problem? I'm very happy with the system by the way and I don't really want to switch back so quickly ... :) The logs don't give much information when the problem occurs: [INFO] [UHD] linux; GNU C++ version 10.2.0; Boost_107500; UHD_4.0.0.0-0-unknown [INFO] [B200] Detected Device: B200 [INFO] [B200] Operating over USB 3. [INFO] [B200] Initialize CODEC control... [INFO] [B200] Initialize Radio control... [INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed [INFO] [B200] Setting master clock rate selection to 'automatic'. [INFO] [B200] Asking for clock rate 16.000000 MHz... [INFO] [B200] Actually got clock rate 16.000000 MHz. [INFO] [B200] Asking for clock rate 20.000000 MHz... [INFO] [B200] Actually got clock rate 20.000000 MHz. [INFO] [MULTI_USRP] 1) catch time transition at pps edge [INFO] [MULTI_USRP] 2) set times next pps (synchronously) O >>> Done Thank you for the attention given to my problem, Thomas
