John Williams

Hi all, Thanks for the replies. @malexander - Yes the VDI is as you described - the Ubuntu image is running on the cloud and we use a client (VMWare Horizon) running on Windows to connect to it. THe client can pass through USB. This is how our IT department set it up so they don't have to manage individual local lab images. @attila I already suggested using WSL 2 or even using Docker images but they won't have this due to security concerns. In the past I have used VirtualBox successfully but this also isn't supported now we have the VDI which was introduced during the COVID lockdowns to support students working from home.. I already use the VDI to connect to USB development boards (Xilinx Vivado connecting to an FPGA and gdb connecting to an ARM Embeddded DSP board) successfully so I don't think it is the UDEV rules. What I am trying to do is also use the Analogue Discovery boards with Waveforms software to provide the diagnostic tools for the DSP work instead of oscilloscopes and signal generators. My backup plan would be to run Waveforms on the Windows host with the development on the VDI but I would still prefer an all VDI solution - just as it would be more convenient for the students. John

Thanks Attila. I have tried what you suggested but it still gives the same result showing 1 device under FTDI corresponding to the device being connected and 0 under DMGR and DWF. As far as I am aware the VDI requires VHCI drivers for USB which have to be rebuilt every time the kernel is updated. Could this be causing a problem? I would like to know if anyone else has got this software working on a VDI to find out a solution. Otherwise I guess we will have to have the students doing their courseworkr on the VDI Ubuntu image but using the Windows host OS to run the instrumentation software which is not ideal.

Thanks. Here is what I see report when I run this file - not sure what it should be. FTDI Version: 0x10424 Devices: 1 1. SN:b'' b'' flags: 0x1 type: 0x3 id: 0x0 locid: 0x0 DMGR Version: b'2.11.9' Devices: 0 DWF Version: b'3.19.5' Devices: 0

Hi @attila, Thanks. I have tried this but still to no avail. Does the Waveforms App have a timeout for response on scanning the USB ports and could that be causing a problem? I have been able to get this to work with other USB devices such as embedded development boards, so am at a bit of a loss. Regards, John

I am using Waveforms on Ubuntu with Analogue Discovery 2 hardware. All works well on a local Ubuntu install. However in order to roll this out for student laboratories we will be using a Ubuntu image on a VDI and the VMWare Horizon client on Windows for access. When I attempt this the Waveforms application runs does not see the Analogue Discovery 2 Device. The Analogue Discovery USB device has been attached/connected to the VDI client and is listed when I type lsusb on a linux terminal. Is this something that should work, or are there any known solutions? If not what are the recommended workarounds? The context of what I am trying to do is use the Analogue Discover 2 as a test instrument for DSP hardware practicals for my students. My preference is to use Ubuntu as the C/DSP development platform and therefore also to have Waveforms running on Ubuntu as the test instruments. At my university Ubuntu is provided over the VDI - they don't want to support dual boot as this disables the secure booth facilities (aparently). Any suggestions welcome. A fallback is to do it all on Windows but this would, in my opinion, be very much second best. Regards, john