[Vm-dev] Serial ports on Linux

Markus Lampert markuslampert at yahoo.com
Wed Sep 1 15:28:38 UTC 2010

Hi Bill,

haven't used the serial interface with the new VMs (yet), but previously under 
Linux I had to use the vm option '-notimer'. I did not find any negative side 
effects with that option.

Hope this helps,

----- Original Message ----
> From: "Schwab,Wilhelm K" <bschwab at anest.ufl.edu>
> To: "Pharo-project at lists.gforge.inria.fr" 
><Pharo-project at lists.gforge.inria.fr>; "squeak-dev at lists.squeakfoundation.org" 
><squeak-dev at lists.squeakfoundation.org>; "vm-dev at lists.squeakfoundation.org" 
><vm-dev at lists.squeakfoundation.org>
> Sent: Wed, September 1, 2010 9:27:39 AM
> Subject: [Vm-dev] Serial ports on Linux
> I have been able to do serial I/O on Windows, but not Linux.  Running  in a 
>terminal to capture output yields "Error while saving old state" while  trying 
>to open just about any number or name I can think of (including 0 and  
>/dev/ttyS0), but the open method gives no indication that there is a problem; it  
>returns a perfectly valid looking serial port with the #port set to whatever it  
>was given.
> Subsequent reads fail, and are probably a bit more honest  about what is 
>happening: "Error while reading: serial port is not open."  I  am not sure 
>whether that is always the case, but it certainly is on this machine  when I try 
>/dev/ttyUSB0, which does not exist here.
> Any  ideas?
> Bill

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