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From: whitney@saturn.sdsu.edu (Roger Whitney)
Newsgroups: comp.lang.smalltalk
Subject: Help! Smalltalk-80 screen lock problem on Sun 4/470.
Message-ID: <1991Jan18.004452.29357@ucselx.sdsu.edu>
Date: 18 Jan 91 00:44:52 GMT
Sender: news@ucselx.sdsu.edu (News Admin)
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Organization: San Diego State University, Math Dept.
Lines: 21
Originator: whitney@saturn.sdsu.edu


	I am using Smalltalk-80 v2.5 on both Macintosh computers and a 
Sun 4/470 Sparc station running Sun OS 4.1.  While Smalltalk on the Mac
works fine, I have a problem with it on the Sun. Smalltalk on the Sun 
locks up the screen.  The mouse still moves around the Smalltalk window,
but will not leave the window. Control-C and control-shift-C have no
effect.  A far as I can determine no input from the keyboard or 
mouse has any effect. I have no idea what causes the problem.  
When the problem first started the screen would freeze very
frequently, every few minutes.  I use open windows, but switched
to sunview, with no change. I tried a new image, and tried to 
recompile a new VM, to no avail.  Running Smalltalk in the background
"seemed" to "fix" the problem.  However the problem is now back.
The screen does not seem to freeze as often, but that is hard to
measure. I do 90% of my work on the mac, then move it to the Sun.
It is time to start more of the work on the Sun, so it is time
to solve the problem.  Does anyone have any idea what the problem is 
and how to solve it? Thanks in advance for any help.

roger whitney
whitney@sdsu.edu