Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hpfcso!stroyan
From: stroyan@hpfcso.HP.COM (Mike Stroyan)
Newsgroups: comp.sys.hp
Subject: Re: HP 700/X terminal and starbase sox11
Message-ID: <7370261@hpfcso.HP.COM>
Date: 27 Nov 90 18:35:16 GMT
References: <1990Nov27.030807.15056@sunee.waterloo.edu>
Organization: Hewlett-Packard, Fort Collins, CO, USA
Lines: 31

>                                There seems to be a critical timing bug
>associated with the opening of the window and the call to gopen.  In theory,
>this shouldn't happen because I wait for server to notify me that the window
>is open before I attempt to call gopen.  Also, the terminal seems to view
>the bitmap_to_file function as particularly evil.  It sometimes will work,
>but generally causes the terminal to die.

The older MIT sample servers, (and possibly the terminal's software),
would not consider a window id valid for other connections until the
window was mapped for the first time.  The sox11 driver has a separate
connection to the display, so it could run into this problem.  To avoid
the problem map the window and wait for a MapNotify event before calling
gopen.  You actually have to wait for a MapNotify because the window
manager can redirect an XMapWindow request and delay the mapping
indefinitely.

The bitmap_to_file function uses block_read to get data from the server.
There was a correction to the block_read function in the sox11 driver
made last January.  It corrected block_read data problems on the four
plane HP X terminals.  The first release with that fix was 7.03.

Neither of these problems are known to make the server die.

>I would submit a software report on this one but it is not clear to me who
>it should be sent to, the HP-UX guys or the HP 700/X guys.  Actually I don't
>even now how to submit bug reports on that terminal now that I think of it.

Go ahead and send it to the HP-UX guys.  They can talk to the HP 700/X guys.
Full version numbers and short source code examples are much appreciated.

Mike Stroyan, mike_stroyan@fc.hp.com