OK so it looks like after 2020-09-01 updates that had lot's of NVIDIA stuff, same error reproduces again:
``` $ pvkrun vkcubeprimus: fatal: Bumblebee daemon reported: error: [XORG] (EE) Unable to locate/open config directory: "/etc/bumblebee/xorg.conf.d"
``` ``` $ optirun glxgears[ 5856.436157] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Unable to locate/open config directory: "/etc/bumblebee/xorg.conf.d"
[ 5856.436198] [ERROR]Aborting because fallback start is disabled. ``` ``` $ primusrun glxgearsprimus: fatal: Bumblebee daemon reported: error: [XORG] (EE) Unable to locate/open config directory: "/etc/bumblebee/xorg.conf.d
``` optirun/primusrun/pvkrun does not work. glxgears does run with integrated graphics, but not with NVIDIA. Attached /etc/bumblebee directory contents. Here's what /var/log/apt/history.log tells: Start-Date: 2020-09-01 18:26:20 Commandline: apt full-upgrade Requested-By: vincas (1000)Upgrade: libmpc3:amd64 (1.2.0~rc1-1, 1.2.0-1), libnvidia-glvkspirv:amd64 (450.57-3, 450.66-1), libnvidia-glvkspirv:i386 (450.57-3, 450.66-1), libstdc++-10-dev:amd64 (10.2.0-5, 10.2.0-6), liblouisutdml-data:amd64 (2.8.0-4, 2.9.0-1), libwayland-egl1:amd64 (1.18.0-2~exp1, 1.18.0-2~exp1.1), libwayland-egl1:i386 (1.18.0-2~exp1, 1.18.0-2~exp1.1), mesa-opencl-icd:amd64 (20.1.5-1, 20.1.6-1), libgles-nvidia1:amd64 (450.57-3, 450.66-1), libgles-nvidia1:i386 (450.57-3, 450.66-1), libgles-nvidia2:amd64 (450.57-3, 450.66-1), libgles-nvidia2:i386 (450.57-3, 450.66-1), xserver-common:amd64 (2:1.20.8-2, 2:1.20.9-1), g++-10:amd64 (10.2.0-5, 10.2.0-6), libnvidia-ml1:amd64 (450.57-3, 450.66-1), nvidia-vulkan-icd:amd64 (450.57-3, 450.66-1), nvidia-vulkan-icd:i386 (450.57-3, 450.66-1), xserver-xorg-core:amd64 (2:1.20.8-2, 2:1.20.9-1), nvidia-egl-icd:amd64 (450.57-3, 450.66-1), nvidia-egl-icd:i386 (450.57-3, 450.66-1), libegl-mesa0:amd64 (20.1.5-1, 20.1.6-1), libegl-mesa0:i386 (20.1.5-1, 20.1.6-1), lib32stdc++6:amd64 (10.2.0-5, 10.2.0-6), libaprutil1:amd64 (1.6.1-4+b1, 1.6.1-5), gcc-10-base:amd64 (10.2.0-5, 10.2.0-6), gcc-10-base:i386 (10.2.0-5, 10.2.0-6), electrum:amd64 (4.0.2-1, 4.0.2-2), libobjc4:amd64 (10.2.0-5, 10.2.0-6), nvidia-driver:amd64 (450.57-3, 450.66-1), libglapi-mesa:amd64 (20.1.5-1, 20.1.6-1), libglapi-mesa:i386 (20.1.5-1, 20.1.6-1), mesa-common-dev:amd64 (20.1.5-1, 20.1.6-1), lib32gcc-s1:amd64 (10.2.0-5, 10.2.0-6), mesa-vulkan-drivers-dbgsym:amd64 (20.1.5-1, 20.1.6-1), liblouis20:amd64 (3.14.0-1, 3.15.0-1), libitm1:amd64 (10.2.0-5, 10.2.0-6), nvidia-vulkan-common:amd64 (450.57-3, 450.66-1), xserver-xorg-legacy:amd64 (2:1.20.8-2, 2:1.20.9-1), libxatracker2:amd64 (20.1.5-1, 20.1.6-1), python3-louis:amd64 (3.14.0-1, 3.15.0-1), nvidia-vdpau-driver:amd64 (450.57-3, 450.66-1), libgl1-nvidia-glvnd-glx:amd64 (450.57-3, 450.66-1), libgl1-nvidia-glvnd-glx:i386 (450.57-3, 450.66-1), libegl1-mesa:amd64 (20.1.5-1, 20.1.6-1), cmake-data:amd64 (3.16.3-3, 3.18.2-1), libasan6:amd64 (10.2.0-5, 10.2.0-6), libglx-nvidia0:amd64 (450.57-3, 450.66-1), libglx-nvidia0:i386 (450.57-3, 450.66-1), libquadmath0:amd64 (10.2.0-5, 10.2.0-6), orca:amd64 (3.36.5-1, 3.36.6-1), rsyslog:amd64 (8.2006.0-2, 8.2008.0-1), nvidia-kernel-dkms:amd64 (450.57-3, 450.66-1), libgbm1:amd64 (20.1.5-1, 20.1.6-1), libgbm1:i386 (20.1.5-1, 20.1.6-1), libegl-nvidia0:amd64 (450.57-3, 450.66-1), libegl-nvidia0:i386 (450.57-3, 450.66-1), libwayland-client0:amd64 (1.18.0-2~exp1, 1.18.0-2~exp1.1), libwayland-client0:i386 (1.18.0-2~exp1, 1.18.0-2~exp1.1), nvidia-egl-common:amd64 (450.57-3, 450.66-1), libapr1:amd64 (1.7.0-1, 1.7.0-3), libgcc-10-dev:amd64 (10.2.0-5, 10.2.0-6), libllvm10:amd64 (1:10.0.1-4, 1:10.0.1-5), libllvm10:i386 (1:10.0.1-4, 1:10.0.1-5), libnvidia-cfg1:amd64 (450.57-3, 450.66-1), libtsan0:amd64 (10.2.0-5, 10.2.0-6), nvidia-legacy-check:amd64 (450.57-3, 450.66-1), libubsan1:amd64 (10.2.0-5, 10.2.0-6), aspell-de-1901:amd64 (1:2-35, 1:2-36), liblouisutdml9:amd64 (2.8.0-4, 2.9.0-1), libgfortran5:amd64 (10.2.0-5, 10.2.0-6), kinfocenter:amd64 (4:5.17.5-2, 4:5.17.5-3), nvidia-kernel-support:amd64 (450.57-3, 450.66-1), liblsan0:amd64 (10.2.0-5, 10.2.0-6), libgomp1:amd64 (10.2.0-5, 10.2.0-6), libgomp1:i386 (10.2.0-5, 10.2.0-6), nvidia-driver-libs:amd64 (450.57-3, 450.66-1), nvidia-driver-libs:i386 (450.57-3, 450.66-1), nvidia-driver-bin:amd64 (450.57-3, 450.66-1), libgl1-mesa-dev:amd64 (20.1.5-1, 20.1.6-1), libgl1-mesa-dri:amd64 (20.1.5-1, 20.1.6-1), libgl1-mesa-dri:i386 (20.1.5-1, 20.1.6-1), liblouisutdml-bin:amd64 (2.8.0-4, 2.9.0-1), libosmesa6:amd64 (20.1.5-1, 20.1.6-1), libosmesa6:i386 (20.1.5-1, 20.1.6-1), libtss2-esys0:amd64 (2.4.1-1+b1, 3.0.0-1), libgcc-s1:amd64 (10.2.0-5, 10.2.0-6), libgcc-s1:i386 (10.2.0-5, 10.2.0-6), libgl1-mesa-glx:amd64 (20.1.5-1, 20.1.6-1), libgl1-mesa-glx:i386 (20.1.5-1, 20.1.6-1), xserver-xorg-video-nvidia:amd64 (450.57-3, 450.66-1), cmake:amd64 (3.16.3-3, 3.18.2-1), libclang-common-10-dev:amd64 (1:10.0.1-4, 1:10.0.1-5), liblouis-data:amd64 (3.14.0-1, 3.15.0-1), python3-electrum:amd64 (4.0.2-1, 4.0.2-2), libnvidia-rtcore:amd64 (450.57-3, 450.66-1), cpp-10:amd64 (10.2.0-5, 10.2.0-6), mesa-vdpau-drivers:amd64 (20.1.5-1, 20.1.6-1), mesa-vdpau-drivers:i386 (20.1.5-1, 20.1.6-1), mesa-vulkan-drivers:amd64 (20.1.5-1, 20.1.6-1), mesa-vulkan-drivers:i386 (20.1.5-1, 20.1.6-1), libatomic1:amd64 (10.2.0-5, 10.2.0-6), libatomic1:i386 (10.2.0-5, 10.2.0-6), libcc1-0:amd64 (10.2.0-5, 10.2.0-6), libstdc++6:amd64 (10.2.0-5, 10.2.0-6), libstdc++6:i386 (10.2.0-5, 10.2.0-6), libnvidia-cbl:amd64 (450.57-3, 450.66-1), libhtml-parser-perl:amd64 (3.73-1, 3.75-1), libnvidia-glcore:amd64 (450.57-3, 450.66-1), libnvidia-glcore:i386 (450.57-3, 450.66-1), libwayland-server0:amd64 (1.18.0-2~exp1, 1.18.0-2~exp1.1), libwayland-server0:i386 (1.18.0-2~exp1, 1.18.0-2~exp1.1), gcc-10:amd64 (10.2.0-5, 10.2.0-6), libnvidia-eglcore:amd64 (450.57-3, 450.66-1), libnvidia-eglcore:i386 (450.57-3, 450.66-1), mesa-va-drivers:amd64 (20.1.5-1, 20.1.6-1), mesa-va-drivers:i386 (20.1.5-1, 20.1.6-1), libglx-mesa0:amd64 (20.1.5-1, 20.1.6-1), libglx-mesa0:i386 (20.1.5-1, 20.1.6-1), nvidia-alternative:amd64 (450.57-3, 450.66-1), libwayland-cursor0:amd64 (1.18.0-2~exp1, 1.18.0-2~exp1.1), libwayland-cursor0:i386 (1.18.0-2~exp1, 1.18.0-2~exp1.1)
End-Date: 2020-09-01 18:28:17
etc.bumblebee.tar.gz
Description: application/gzip