Re: ham/rtl-sdr troubles under NetBSD.

[Tobias Nygren <tnn%NetBSD.org@localhost>]

On Sun, 29 Mar 2026 16:58:04 +0200
Ramiro Aceves <ea1abz%gmail.com@localhost> wrote:

> Hi,
> 
> I am having some trouble trying to make rtlsdr USB dongle to work properly under NetBSD. This cheap thing is a useful entry level receiver for the amateur radio 2m and 70cm band, also for comercial FM 
> stations and air band reception.

I recall discussions from long ago about problems in the NetBSD ugen(4)
driver that prevents it from sometimes working correctly when the
application wants to access the device asynchronously (with
poll/select/kqueue).

Details are vague. This was discussed many years ago but there
was a libusb patch floating around that worked around the issue,
I think by spawning an internal worker thread.