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Driver may change screen pixmaps after page flipping that would then make damage lose track of the root pixmap. Using root window for shadow damages fixes the problem because SetWindowPixmap is implemented in shadow code. Signed-off-by: Pauli Nieminen <pauli.nieminen@linux.intel.com> Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Keith Packard <keithp@keithp.com>
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