On my Lenovo Ideapad S110 Debian Stretch is just working fine, but HD videos don't run smoothly, at least not in full screen.
i965-va-driver is installed and up to date, vainfo returns
sudo vainfo error: XDG_RUNTIME_DIR not set in the environment. libva info: VA-API version 0.39.4 libva info: va_getDriverName() returns -1 libva error: va_getDriverName() failed with unknown libva error,driver_name=(null) vaInitialize failed with error code -1 (unknown libva error),exit
Maybe anybody can help. Thanks!