From: cdf00@outs.ccc.amdahl.com (Chris Finan)
Newsgroups: comp.os.os2.misc
Subject: Re: very strange bug w/winos2
Date: 9 Sep 92 22:22:38 GMT
Reply-To: cdf00@OUTS.ccc.amdahl.com (Chris Finan)
Distribution: comp.os.os2.misc
Organization: Amdahl Corporation, Sunnyvale CA

In article <SCASTILL.92Sep9122304@tesla.nmsu.edu> scastill@nmsu.edu (Steve Castillo) writes:
>
>I am experiencing a very strange problem in os/2 when running full
>screen windows apps.  I am running on a 50 MHz EISA 486 with an award
>bios and an ATI Graphics Ultra video card.  The machine has 16 Mbytes
>of memory.  I would like to be able to run both full screen dos apps
>and windows apps simultaneously.  For instance Wordperfect for Windows
>and Drawperfect for DOS.  However, whenever I startup a full screen
>windows session, switch to the desktop, switch back to the windows
>full screen session and then back again and then try starting a
>windowed dos session, a
>full screen dos session or a full screen os/2 session, OS/2 does not
>open any of these three sessions correctly.  This is independant of whether or not the full screen
>windows session is still running.  Trying to bring up any of these
>three types of sessions only results in a full screen dos session
>which does not echo any of the characters that I type.  I found 
>that if my initial full screen windows session was Wordperfect,
>trying to start up any of the other three sessions puts me into the
>startup directory for wpwin!  If I simply startup full screen windows
>initially, then trying to start up any of the other three sessions
>puts me into the startup directory for winos2 (\).  It almost acts like
>the three sessions are using the settings from my windows app rather
>than their own once I have gone through the previously described
>sequence with the winos2 full screen session.  However I checked the
>settings for all the sessions, and all seems well.
>
>This occurs with both the generic IBM 8514 or ultra driver for
>windows.  I am using the IBM 8514 driver for os/2.
>
>I would appreciate any words of wisdom on this one.
>
>Steve Castillo
>Electrical Engineering
>New Mexico State U.
>Las Cruces, NM  88003
>
>(505)646-3214
>scastill@nmsu.edu
>
>--
>*****************************************************************
>Steve Castillo
>New Mexico State University
>Las Cruces, NM
>
>scastill@nmsu.edu
>(505)646-3214

I have the exact same problem as you describe. I also have an ATI graphics
ultra. Machine is a 486DX2 50Mhz ISA with AMI bios. One thing I noticed is
that the only problem is that the screen is messed up. You really are in the
correct directory. If you create a file via a DOS command (typing blind 
since the characters don't show up) it is in the directory the session is 
supposed to be in, not the directory shown in the screen command prompt.

You can avoid this problem by toggling the values of the              
VIDEO_SWITCH_NOTIFICATION and the XGA_IOTRAP settings for all Full Screen DOS
and WinOS2 sessions. (Sorry I can't remember the exact settings or the 
setting values but I'm not at my OS/2 machine now.)

However after making the above setting changes I have a different (but less
disastorous) problem. When I want to switch from the WinOS2 full screen 
session to the OS2 desktop I click on the OS2 Icon. My keyboard and mouse 
now lock up for just about 13 seconds exactly with no disk activity.
After the 13 seconds the switch to the OS2 Desktop happens and everything is
back to normal. 

I'm curious if you have similar pause in your system after making the setting 
changes. 

Does anyone know how to solve these problems?

Chris Finan
cdf00@cd.amdahl.com
408-737-5366
Newsgroups: comp.os.os2.misc