[Libva] Permission problem using vaapi.

[dE]

Hi,
     This's a fairly common problem. As root --

./vainfo
libva info: VA-API version 0.39.2
libva info: va_getDriverName() returns 0
libva info: Trying to open 
/home/de/small/temp_small/libva/root/lib/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.39 (libva 1.7.1)
vainfo: Driver version: Intel i965 driver for Intel(R) Ironlake Mobile - 
1.7.1
vainfo: Supported profile and entrypoints
       VAProfileMPEG2Simple            : VAEntrypointVLD
       VAProfileMPEG2Main              : VAEntrypointVLD
       VAProfileH264ConstrainedBaseline: VAEntrypointVLD
       VAProfileH264Main               : VAEntrypointVLD
       VAProfileH264High               : VAEntrypointVLD
       VAProfileNone                   : VAEntrypointVideoProc

As user --
./vainfo
libva info: VA-API version 0.39.2
libva info: va_getDriverName() returns 1
libva error: va_getDriverName() failed with operation 
failed,driver_name=i965
vaInitialize failed with error code 1 (operation failed),exit

Yes, I'm in the video group.