Hello, I am having trouble initializing the i965 driver on a headless Skylake system running Ubuntu 16.04. $ ./vainfo error: can't connect to X server! libva info: VA-API version 1.4.0 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 Running it with i965 specified in the environment, I get the following: $ LIBVA_DRIVER_NAME=i965 VA_INTEL_DEBUG=1 ./vainfo error: can't connect to X server! libva info: VA-API version 1.4.0 libva info: va_getDriverName() returns -1 libva info: User requested driver 'i965' libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva info: Found init function __vaDriverInit_1_3 g_intel_debug_option_flags:1 vainfo: intel_driver.c:113: intel_driver_init: Assertion `((((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_DRI1)) || (((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_DRI2)) || (((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_CUSTOM)))' failed. Aborted (core dumped) I have backported 2.4.0-1 Ubuntu .debs of the libva packages (libva-dev, libva-drm2, libva-glx2, libva-wayland2, libva-x11-2, libva2) installed, along with i965-va-driver built from source from the 2.3.0 release. I had the same issue with backported 2.3.0-2 libva .debs. My libdrm packages are version 2.4.91-2 and Mesa packages are version 18.0.5. lscpu reports that my CPU is Intel(R) Core(TM) i7-6700TE CPU @ 2.40GHz, and lspci reports that the graphics chip is Intel Corporation Sky Lake Integrated Graphics (rev 06). My user is in the video group and has access to /dev/dri/card0. The kernel has the i915 and drm modules loaded. I'm trying to do hardware-accelerated video encoding from an application through OpenCV and Intel Media SDK, which ultimately uses libva. This code (and the vainfo command) works fine on a separate machine with a different Skylake processor running X (and with the X server killed). That machine reports Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz and Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07). -- Aaron Mavrinac | Staff Autonomy Developer - Perception 226 246 2071 mobile 1425 Strasburg Rd. Suite 2A | Kitchener, ON N2R 1H2, Canada amavrinac(a)clearpath.ai | www.ottomotors.com