NVD_BACKEND=direct doesn't work #392
Description
Distro: Linux Mint
Driver: nvidia-driver-575
Graphics Card: Nvidia GTX 960
When I use NVD_BACKEND=direct, vainfo fails to initialize.
NVD_LOG=1 NVD_BACKEND=direct vainfo libva info: VA-API version 1.20.0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so libva info: Found init function __vaDriverInit_1_0 98485.191973463 [46414-46414] ../src/vabackend.c:1872 __vaDriverInit_1_0 Initialising NVIDIA VA-API Driver: 0x63cdc3ff3f50 10 98485.191978205 [46414-46414] ../src/vabackend.c:1894 __vaDriverInit_1_0 Now have 0 (0 max) instances 98485.191979886 [46414-46414] ../src/vabackend.c:1919 __vaDriverInit_1_0 Selecting Direct backend 98485.208674778 [46414-46414] ../src/direct/nv-driver.c: 190 init_nvdriver Initing nvdriver... 98485.208687753 [46414-46414] ../src/direct/nv-driver.c: 195 init_nvdriver Got dev info: 100 fe 1 1 98485.208708619 [46414-46414] ../src/direct/nv-driver.c: 36 nv_alloc_object nv_alloc_object failed: -1 0 98485.208710153 [46414-46414] ../src/direct/nv-driver.c: 216 init_nvdriver nv_alloc_object NV01_ROOT_CLIENT failed 98485.208712649 [46414-46414] ../src/direct/nv-driver.c: 278 init_nvdriver Got error initing 98485.208717568 [46414-46414] ../src/direct/nv-driver.c: 79 nv_rm_control nv_rm_control failed: -1 0 libva error: /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so init failed libva info: va_openDriver() returns 1 vaInitialize failed with error code 1 (operation failed),exit
I'm very new to Nvidia, this is my first discrete card and my first ever Nvidia graphics.
I also can't really find the documentation on the NVD_BACKEND=direct variable.