[Libva] Permission problem using vaapi.

[Xiang, Haihao]

> 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
> 

According to the above info, I presume you are using vaapi on X11, is
that right? Does vainfo work for you if no X11?

> Yes, I'm in the video group.

What is the permission mode of /dev/dri/card0 and /dev/dri/renderD128?


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