VanguardLH wrote:
Paul wrote:

Spatially separating the USB3 side of the machine from the Bluetooth
side of the machine, may be enough to stop the stuttering.

Stacked USB ports have more induced RFI than do side-by-side USB ports.
A shielded USB extender cable in one USB port that is near another would
reduce RFI between them. Stacked USB ports are common in desktops but
mobile devices many don't have enough height so they are side-by-side
(sometimes right next to each other, sometimes on opposite sides of the
device). The OP said he has the Bluetooth operational interference on a
Lenovo Thinkpad but gives no model within the Thinkpad product family
line. At:

https://lnv.i.lithium.com/t5/image/s...E30208D6?v=1.0

the USB 3 and 2 ports are side-by-side; however, another pic of
Thinkpads show some have stacked ports:

https://encrypted-tbn0.gstatic.com/i...H8nPG2_9hyg4Ct

Moving the items apart is pretty easy to do.

https://s15.postimg.cc/6v7l9mezf/move_items_apart.gif

Paul