rprr

Szia and Attila
I got a Raspberry Pi 4 last week on release day (got the 2GB version as they sold out of 4GB in half a day) .  Just got it plugged into the Analog Discovery and it works!
Not really tried it for long but it seems to work reliably, but only well on USB3.
On USB3 port, first time it wasn't recognised, but tried again after swapping devices around a then it was detected.  Maybe it clashed with my wireless mouse dongle   When I tried USB2 port, it connected immediately but I found that every few minutes (max 5-10mins) it would throw a device error window and I would have to clear and reconnect.  Maybe RPi foundation kept the FTDI chipset for USB2 and used a new one for USB3 (Pi datasheet only says there is one chipset and it's not FTDI).    I will try and soak test tomorrow, but looking good on USB3.   So far it has been running 23mins with no apparent glitches, and Chromium tabs open.  Waveforms taking 13-20% of CPU in task manager.
 

Just to add, that I've tried it with the recently released Raspberry Pi  3B+ but no luck. I have updated to the latest kernels. Very frustrating  
I wonder if there is a problem with the Digilent Adept runtime drivers for linux.