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You need to install xvba-va-driver to get it work with fglrx. Run sudo apt-get install xvba-va-driver With this driver discrete GPU will work with vaapi.


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After a little research it was obvious that xorg.conf doesn't really matter. VAAPI just won't work on a discrete GPU. aticonfig --px-igpu enables it, while aticonfig --px-dgpu kills it.


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Delete your /etc/X11/xorg.conf It will make the FGLRX driver to default itself to the HD 7640G after reboot and you'll get working VAAPI with HD 8500M being completely disabled. It seems that "aticonfig --initial" command is unable to generate a proper and valid xorg.conf on a dual-adapter systems regardless of it's additional parameters. PS You may also ...



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