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Date:      Tue, 9 Feb 1999 23:09:43 -0700 (MST)
From:      "Kenneth D. Merry" <ken@plutotech.com>
To:        aa8vb@pagesz.net
Cc:        multimedia@FreeBSD.ORG
Subject:   Re: 8Meg Milleniums & XFree86 Direct Video bug  (was Re: FXTV - picture outside of fxtv window)
Message-ID:  <199902100609.XAA19755@panzer.plutotech.com>
In-Reply-To: <199902100505.WAA17227@panzer.plutotech.com> from "Kenneth D. Merry" at "Feb 9, 1999 10: 5: 4 pm"

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Kenneth D. Merry wrote...
> Randall Hopper wrote...
> > Kenneth D. Merry:
> >  |One other problem I have:  when switch fxtv from ~640x480 (i.e., full size)
> >  |to ~320x200, or when I exit fxtv while it is full size (640x480 window), my
> >  |screen shifts one or maybe two pixels right, and one or two pixels down.
> >  |
> >  |It more or less wraps around, i.e., the pixels that should be at the far
> >  |right wind up on the far left.  And the pixels that should be at the
> >  |bottom wind up at the top.
> >  |
> >  |The wrap-around effect goes away when I move my mouse to the far right of
> >  |the screen, and then to the bottom of the screen.
> >  |
> >  |This smells like an XFree86 bug, but I suppose Randall would have a better
> >  |idea on whether fxtv could be doing something wrong.
> > 
> > Hmm.  Not too sure about this one.  It sounds like it may be related to
> > something I fixed recently.  Sometimes, when switching video modes
> > (full-screen zoom), fxtv would ask X to set the desktop viewport origin to
> > an invalid value.  X doesn't do proper checking, and sometimes ends up
> > displaying video memory that isn't even a part of your desktop.
> > 
> > I'm fixing to cut a new version here shortly which contains the fix.  So
> > hopefully that'll do it.  If not, we'll see where to go from there.
> 
> Well, once I hacked fxtv 0.48 to build, it fixes the problem I outlined
> above.  (screen wraps right and down by one pixel when you switch from
> 640x480 to 320x200 mode)
> 
> It does cause problems, though, when I switch from full screen mode (i.e.,
> the X server is 640x480) back to 1280x1024.

I guess I should be more specific.  The problem is the same as it was
before when I switched from 640x480.  The screen shifts right one pixel and
down one pixel.

> To recap:  I've got a Matrox Millennium with 8MB RAM.  I run at
> 1280x1024@32bpp with XFree86 3.3.3.1.

Ken
-- 
Kenneth Merry
ken@plutotech.com

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