On Fri, 10 May 1996 13:20:41 +0930 (CST) 
 Alex Ardalich <alex@dove.mtx.net.au> wrote:

 > It makes a mess of X (causing me to refresh constantly) and is driving
 > me nuts...

Run xconsole, or xterm -C ... it will re-direct console messages 
somewhere else, thus lessening your annoyance :-)

 > The messages (from the serial ports me guess)
 > 
 > ....zs0a: ring overrun
 > ....zs0b: ring overrun
 > ....last message repeated n times

ring overrun ... I think that's the message you get when the zs software 
ring buffer fills ... i.e. the tty layer hasn't had enough of a chance to 
drain the software "fifo".

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Jason R. Thorpe                                       thorpej@nas.nasa.gov
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