Am Montag, 14. Juli 2003 12:56 schrieb Richard F Weber:
> Michel Dänzer wrote:
> >On Mon, 2003-07-14 at 02:59, Alex Deucher wrote:
> >>--- Michel Dnzer <[EMAIL PROTECTED]> wrote:
> >>
> >>
> >> <snip>
> >>
> >>>It's not clear to me what exactly you have tried, please describe in
> >>>more detail.
> >>
> >>I created a virtual framebuffer of size 2080x480. I then started an
> >>instance of glxgears and resized the window to about 3/4 of the size of
> >>the frambuffer. I then started a second instance of glxgears and
> >>placed it next to the first instance, then resized it. it resized fine
> >>until I hit the 2048 boundry, then the window (the one I was resizing),
> >>went black; the first window was still showed gears. resizing smaller,
> >>the gears came back when I crossed the 2048 boundry again.
> >
> >Weird, I don't understand what would cause the window to go blank. What
> >happens when you enlarge a single window beyond 2048, does it go blank
> >as well, or is the rendering cropped to 2048? In the latter case I
> >suspect this is a different problem.
>
> Sorry for jumping in, but I found the bug and initially posted comments
> to it on dri-users.
>
> I'll go over the basics quickly. I've got a dual-head running
> 1280x1024 (virtual 2560x1024) on both heads using the mergedfb code to
> create a single desktop. If I create an opengl application it works
> fine placing the window anywhere, up until 1 side of it hits the 2048
> mark. Once it hits 2048, the entire window goes blank. Doesn't matter
> how large or small the window is, once it crosses 2048, it's done. If I
> move the window back away from the border, the window shows it's
> contents again. Judging from the framerates, the calculation is
> actually occurring in the background, but it's just not rendering to the
> screen. Framerates jump from ~650 to ~1300 when the window doesn't draw
> to the screen.
[-]
> I'm running a Radeon 7500 VE dual-head, and if you need me to run any
> tests, or sample code, let me know and I'll do the best I can.
Can you please try "stex3d"?
It shows wrong rendering/clipping even if you run a single head and move the
window to the right side of the screen (1280x1024x24/32).
Snapshots available if needed.
I think it could be related.
Regards,
Dieter
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