[NTLUG:Discuss] Kubuntu Serial Ports

[Chris Cox]

On Wed, 2009-09-09 at 14:57 -0500, Michael Barnes wrote:
> I have a machine with an on-board serial port, plus I added a four port
> serial card.  I installed Kubuntu 9.04 (latest download this morning).  When
> the installation was finished, I did
> $ ll /dev/ttyS*
> and it showed me a list of ttyS0-ttyS7 as expected.  A few minutes later, I
> started getting all kinds of low disk space warnings and realized I'd messed
> up the partitions.
> At that point, it was just as easy to re-install, so I did, setting up the
> partitions properly this time.
> 
> My problem is now it only shows ttyS0-ttyS3.  The on-board port and the
> first three ports of the card work fine as com 1-4.  But I cannot get it to
> show the other four ttyS ports like it did before.
> 
> Any ideas on where a setting for maximum serial ports is?  I've found it
> mentioned a few places in searches, but not actually how to fix it.

Ideally, this is all handled through device detection and udev for the
device creation.  So... probably not a max serial port issue.

Poweroff, remove the card, reboot, then poweroff, add card, boot.

See if that fixes things.  Just an idea.