For anyone looking at this bug report, if you use debian's packages it works. It's vdpau-va-driver:
64 bits:
http://ftp.br.debian.org/debian/pool....4-7_amd64.deb
32 bits:
http://ftp.br.debian.org/debian/pool...7.4-7_i386.deb
Install both. Then run vainfo.
But I cant solve the scanner problems.
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