On Mar 03 08:11:49, n...@holland-consulting.net wrote:
> > Anyway, waht is it that makes the new com(4)s
> > hang on 'ttyflags -a' at rc(8) time?
> >
> > Jan
>
> I've seen this behavior on some rather attractive priced 8 port PCI
> serial cards which attached as puc(4). What I found is that they hung
> on Piii-class machines, but "worked" on P4 machines, at least until
> realized the P4 was sucking huge amounts of power, fans running at full
> speed, pumping out lots of heat, and showing huge interrupt loads when
> the machine was idle, and removing the 8 port card eliminated the
> problems.
>
> Heh. From memory, I think those were NetMos based cards, too.
>
> So, it seems some puc(4) devices end up causing horrible interrupt
> storms.
>
> There ARE two port PCI cards that work just fine. So I'd suggest
> trying other cards if two ports is all you need.
Would you please recommend a particular one,
or even the dmesg lines?
> In a project where I wanted some serial consoles on a remote system,
> and was told "don't do puc(4)", I ended up using a USB to 8-serial port
> device -- I think we were able to get this for under $150US. Here's
> how it shows in dmesg, attached to an Alix system:
> [...]
> Bad news: we HAVE had problems with the device locking up. Now, our
> machine with the eight port USB->serial device is devoted to being
> the serial console for five other machines, so a quick reboot when we
> need console is no big deal, and this fixes the port lockups. But if
> you are hoping an important production machine can ALSO be the console
> for other important machines...this is probably not your best choice.
This is my home workstation from which
I want to connect to my two ALIXes.
Thanks for the insight
Jan
