This probably has a less than 10% chance of resolving the problem.

Have not seen the same problem on my VS3100/XX

The vtxxx terminals may have smooth scrolling, wrap around, printer port
facilities.  The terminal may send a X-Off (control s) to the computer.
It should send an X-On (control q) when it can recieve additional info.

You might try typing control-q to see if that will clear things up.
In addition you might go into setup and reset the terminal.
On some vtxxx terminals a lock lite comes up the computer has sent a
X-Off which prevents the terminal from sending stuff.

From your message it seems to indicate that it locks up at different
points in time.  If it always stops at the same point you should probably
post that.

Note: I've had trouble with getting Alpha2 to make a file system on my
rz56s while I was successful in using the Alpha1 kernel to do the same
thing.

johnh...

 On Thu, 21 Sep 2000, Brian Harrington wrote:

> Date: Thu, 21 Sep 2000 19:34:39 -0400
> From: Brian Harrington <brian@sigh.mse.jhu.edu>
> To: port-vax@netbsd.org
> Subject: VS3100 Serial Console Problems
> 
> 
> Hi --
> 
> I'm trying to netboot 1.5_ALPHA2 on a VS3100/38, with a VT420 attached to 
> the serial port.  Everything seems to go fine until at some point in the 
> boot, when the machine stops responding to keyboard input.  Messages to the 
> console still display, I just can't type anything.  Does anyone know what 
> might be going on?  Thanks.
> 
>                    -- Brian
> 
> --
> Brian Harrington
> Digital Knowledge Center
> The Johns Hopkins University
> brian@sigh.mse.jhu.edu
>