On r600 _mesa_meta_clear causes the glxgears to only show the old backbuffer until the window is resized. meta_clear_tris worked. commit 18916986b4a7155e3cba2efb5dfd79dc561cfa41
MrCooper suggested that the new meta clear code avoid redundant viewport calls which may be the cause of the problem.
Created attachment 29125 [details] [review] first guess patch/fix Does this patch help?
No. Same behavior as before.
Could you do a little debugging and check that the vertex positions in _mesa_meta_clear() are correct?
fixed in 6a97cca0817b743e0633ff76630a5bef24469d1b. The render buffer target state wasn't set up in some cases so it never got emitted.
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