OS/2 Professional/OS2PRO194.ISO/os2/patches/tcpip121/pmx/readme.1st

Text File | 1992-07-22 | 8.1 KB | 175 lines

          X Window System Update for OS/2 TCP/IP 1.2.1
                       Version 1.2.1.3
                         1992 July 22

                         INSTALLATION

The OS/2 TCP/IP 1.2.1 "refresh" base must already be installed.  The X
Window System option also must already be installed, and the XFILES
environment variable must have been defined as a part of this process.
It does not matter if earlier beta test versions have already been
installed or not.  This version does not contain the complete X Window
System option for TCP/IP 1.2.1.  It only has things that have changed
since the release of 1.2.1.

If PMX is running, stop it before trying to install the update.

Put the first (or only) update diskette in a diskette drive, and run
INSTALLX on the diskette.  For example, if the diskette is in the a:
drive, type at a command prompt:

   a:installx

Note for those maintaining LANs:  If the files from the diskette(s)
are copied to a directory of a shared disk on your LAN, you should be
able to run INSTALLX from that directory to install the update.
You will want to use the "-logpath dir" command line option, to
cuase the PMX.LOG file to go to a private directory, rather than the
shared XFILES directory.


              WARNING ABOUT NEW COLOR FEATURES

This version is much less "beta code" than the previous.  Please
read the on-line documentation about color support!  A brief
summary follows, but not all details are covered.

If you do not specify -pseudo on the command line, then -static
will be the default.  However, if PMX discovers that the PM
device driver supports modifiable color tables, the default will
be -static -pseudo.  In the latter case, most X client that try
to modify color tables will NOT discover that they can do so, by
making a request for the PseudoColor visual.  Also be warned that
a number of PM device drivers, epecially in OS/2 2.0, do not say
that they can support modifiable color tables, when in fact they
can.  If you want it, you will have to say -pseudo on the command
line.

Be warned that ordinary VGAs do not support -pseudo.  If you chose
"seamless windows" for running Microsoft Windows programs, then
you will get VGA mode, and -pseudo will not work.

We attempt to not modify system colors; this is much better than
before.  We also restore them more nicely, and you have a couple
of menu options on the server window to control this.



                  WARNING FOR OS/2 2.0 USERS

We have done more testing with 2.0, but still have known problems,
even though we have fixed a number of problems and programmed around
some others.  The major ones are listed below in the bug lists.


                         FIX SUMMARY

- version 1.2.1.3 - July 22, 1992 - This version fixes several
problems: For OS/2 2.0, there was interference between REXEC and PMX.
This has been worked around by giving PMX a higher priority class.
ICCCM conventions are observed for the minimum and maximum sizes of
windows. Z order bugs are fixed. Some changes were made which should
fix a number of problems to do with task list entries.  However, not
all reported problem situations could be tested for.

- version 1.2.1.2 - July 13, 1992 - This fixes a problem with PM heap
overflow that affected several users, and fixes a problem with the
sequence maximize-minimize-restore.  There are also more fixes for the
Japanese keyboard. Some sloppiness of positioning of the application
withing the PM frame is also fixed for some applications.  We expect
to get out another version before the 24th of July.

- version 1.2.1.1 - June 24, 1992 - This fixes the keyboard mapping
problem that was in the previous version.  It was seen if you ran
xmodmap (or xinit.cmd).  A bitmap related problem also is fixed.
Unless there are glaring problems, this will be available as a CSD
around the end of June.  We expect to get another CSD out in July.

- version 1.2.1.03 - June 19, 1992 - This version fixes a number of
problems with 1.2.1.  Also focus handling is MUCH closer to normal PM
focus handling.  If you click on a client area, the window will come
to the top, for example.  In 1.2.1 if you closed a window and the next
window that had focus happened to be a OS/2 command window or an
aixterm window, that window had the keyboard locked.  This is now
fixed.  Support for Japanese keyboards is more correct.  We found it
was necessary to turn off PM support for double byte mode, so that the
X application could see the correct keystrokes.  A menu problem with
Interleaf has been corrected.


----------------------------------------------------------------------
In the sections below are major remaining known bugs and things still
not implemented for PMX.
----------------------------------------------------------------------

- Window manager hints -

Not all "window manager hints" are paid attention to as yet.  We do
pay attention to most.  Mainly missing is the use of client specified
icons, colormap conventions and some size conventions, such as
"increments" and "aspect ratios" of width and height.


- Grab Implementation -

"Grabs" are not completely supported yet.  While the cursor is outside
of any X window, no X client has control of focus.  X clients do have
control if the cursor is inside some X client window.  Also no drawing
can be done outside of X windows, so no client could draw a "rubber
band" or "resize rectangle" outside of the X windows, into PM
territory.  Otherwise X "grab" behavior is supported.


- Background window scrolling problem

There is a known problem in the current product version of the OS/2 X
server in some circumstances where a PM window or PM frame of an X
window is on top of an X window.  If the X window in the background is
"scrolled", pieces of the PM frame or PM window can become part of the
scrolled data.  This situation is easily corrected by "refreshing" the
contents of the X client window.  (E.g.  select "refresh all clients"
from the PMX Command pull-down menu, or raise the background window to
the top by clicking on its frame.)  [We are expecting to fix this
fairly soon.]


- Cursor limitations

If an X client creates a cursor using bitmaps that are larger than
32x32, the portion in the lower left corner is used, instead of the
portion around the "hot spot".  The result may be an incorrect
appearing cursor.  The user may avoid using cursors created by X
applications by starting PMX with the -noxcursor parameter.


- PM Device Driver Problems

Some PM display drivers do not implement certain graphic operations
efficiently, and as a result, some types of text display or
"stippling" are slow on some displays.  We have programmed around
these PM deficiencies as best we could, and we expect future versions
of PM drivers to improve these operations.  We also have some command
line options that can affect this.  As of the shipping of this update,
several PM device driver bugs and limitations exist.  (1) The XGA
drivers for both OS/2 1.3 and 2.0 and the 8514 driver for 2.0 all have
a bug where very tall bitmaps are not supported correctly, and their
data can be stored over other bitmaps.  This causes some X fonts to
display incorrectly, and sometimes even PM window titles in non-X
windows have been garbled!  The work-around is to run with the -xga
flag, although this slows things down.  The problem can still happen,
if an X application creates a bitmap that is much larger than the
screen in the X or Y direction (4096 pixels or above).  (2) OS/2 2.0
has some severely low system wide limits on the number of PM bitmaps
that can be created.  If you use the -nofbm command line option, PMX
will not use PM bitmaps to store fonts, at the price of reduced text
speed.  Note that the -xga and -nofbm flags actually do the same thing
at this point.


- Response to PM cursor and keyboard events

When initializing or shutting down PMX, the cursor and keyboard are
not responded to; we attempt with limited success to display the hour
glass cursor in such situations, but really should just let the cursor
and focus go anywhere the user wishes.