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Newsgroups:	comp.os.msdos.djgpp
Subject:	Strange interaction of Allegro and XP?
From:	Neo 1061 <invalid AT erehwon DOT invalid>
Organization:	Geeks Anonymous
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Date:	Sat, 11 May 2002 03:00:36 GMT
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Allegro and Winblows XP don't seem to always get along very well.
An Allegro-using console app is run that instantiates a 1024x768x256 
video mode and begins to draw lines at a constant rate.

A short while passes, maybe two minutes, and the line it's drawing halts, 
which isn't supposed to happen. Turns out the machine is locked hard. No 
response to keyboard, and so forth. Even num lock doesn't make the light 
toggle. A hard reboot is required.

The app in question *only* invoked the video. It did get the mode 
successfully; it did not hook the keyboard interrupt or do anything else 
that could explain this.

Any idea what triggered it?

It probably is irrelevant, but another app (ICQ, apparently in response 
to network activity) played a sound right before the hang. (It should not 
matter, since the Allegro app made no attempt to use the sound card 
itself.)

I'm guessing some weird interaction of device drivers, perhaps the sound 
card and video, but I'd imagine if there were a conflict of that sort, 
Quake 2 would provoke it, but it works perfectly (aside from the screen 
being very dark even at max gamma -- something about this GeForce 2 card 
I suppose)

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