On Thursday 04 Jul 2002 12:41 pm, Keith Whitwell scribed numinously:"
> These all seem to relate to the SET_SCISSORS patch that went in
> recently... It seems that more sychronization is required or the scissors
> uploaded that way are ignored by the 3d part...
>
> Tim?  Are you seeing these droppings?

I've just tried two glxgears at the same time and I am seeing utterly 
strange behaviour with two glxgears running, where sometimes if I move one 
it will leave bits of gears behind (sometimes a whole frame), and sometimes 
corrupt my desktop background image (and I mean really corrupt; not a 
redraw error) with bits of white, indicating a write into an off screen 
area; the bitmap is tiled and if I refresh the whole desktop the corruption 
shows up in all of them; I have to upload a new background image to make it 
go away.

Also if I leave them still only one of the glxgears windows will animate at 
once; a bit of animation from one, with nothing from the other, and so on 
back and forth pretty much randomly (at first I thought it might be related 
to window focus, but it's not).

I see this with the SET_SCISSORS patch, and also with the old behaviour, 
both with and without pageflipping enabled. For experimentation I inserted 
the RADEON_WAIT_UNTIL_2D_IDLE() that I tried the first time and it happens 
with that too.

(on my system glxgears behaves quite oddly with pageflipping enabled even 
with only one; it has brief periods of seeming to animate slowly backwards, 
but shows no significant change in framerate - it is the only app that I've 
tried that behaves so strangely)

I have some suspicions. Amongst them is the fact that the 2D drivers emit 
clip rectangles too, I notice. I will have a look at it and see if I can 
some of fix these problems here.

-- 
Tim Smith ([EMAIL PROTECTED])
"A fray!!!!"
  -- Groo the Wanderer



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