Re: port-i386/57662: StarTech ICUSB23208FD 8-Port USB-to-Serial Adapter Hub fails on Alix with NetBSD/i386 9.3

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Oct 16, 2023 at 01:51:48AM +0200, Alexander Schreiber wrote:
> On Sun, Oct 15, 2023 at 09:35:02PM +0000, Manuel Bouyer wrote:
> > The following reply was made to PR port-i386/57662; it has been noted by GNATS.
> > 
> > From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
> > To: gnats-bugs%netbsd.org@localhost
> > Cc: port-i386-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
> >         netbsd-bugs%netbsd.org@localhost
> > Subject: Re: port-i386/57662: StarTech ICUSB23208FD 8-Port USB-to-Serial
> >  Adapter Hub fails on Alix with NetBSD/i386 9.3
> > Date: Sun, 15 Oct 2023 23:31:07 +0200
> > 
> >  On Sun, Oct 15, 2023 at 08:45:01PM +0000, als%thangorodrim.ch@localhost wrote:
> >  > [...]
> >  > 
> >  > I can then connect via "cu -l /dev/ttyU0 -s 115200" to an attached device,
> >  > and disconnect via the "~." sequence. This works 1-2 times and then any further attempts to do so only yield "cu: link down" and then cu exiting.
> >  > 
> >  
> >  I've seen this with other USB a non-USB serial ports.
> >  Usually this is because the serial port is not completely closed (cu usually
> >  has 2 processes running, one may be left over when exiting).
> >  killing the leftover processes allows a new cu session to start
> 
> The fact that:
>  - upon device plug-in, I get a "fatal breakpoint trap in supervisor mode"

this I don't get. This should cause a panic or a drop to ddb,
but in any case the kernel shouldn't keep running

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--