Have you tried idling the engine before uploading the cursor data?
I haven't played with that part of 2d driver, but shouldn't it do this already as all ATI cards are touchy about framebuffer access while the graphics engine is busy ?
It arguably should, but it doesn't AFAICT.
That's what I thought when I encountered this last, however, both radeon and r200 drivers work fine and last time I had a mouse-triggerred issue it
was due to some commands within R300 DRM driver lacking pacifier sequence.
Once I put it back everything was stable again.
So I have no idea what exactly happens when mouse cursor is updated.
best
Vladimir Dergachev
-- Earthling Michel DÃnzer | Debian (powerpc), X and DRI developer Libre software enthusiast | http://svcs.affero.net/rm.php?r=daenzer
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