Lenovo ideapad 510-15IKB
OS: Ubuntu 18.04 bionic
Kernel: x86_64 Linux 4.15.0-20-generic
CPU: Intel Core i5-7200U @ 4x 3.1GHz
GPU: Intel HD 620 + NVIDIA GeForce 940MX (Optimus)
UEFI boot, Secure Boot disabled.
Driver: 396.24 via graphics-drivers PPA (standard non-PPA nvidia-graphics-drivers-390 driver also affected)
Note: OpenGL applications are not affected.
Vulkan applications (e.g. vulkan-smoketest, Unreal Editor, Dolphin, SDK demos) cannot initialize the Vulkan swap chain and crash. If I run any program that uses the GPU (e.g. glxgears, vulkan-smoketest, nvidia-bug-report.sh) as root (with sudo) then any Vulkan program as a normal user, Vulkan works until I shut down or reboot the computer.
This only happens if:
- I start X via GDM or startx (sddm and lightdm are not affected) as a non-root user
- nvidia-drm.modeset=1 is set (I added it to GRUB_CMDLINE_LINUX_DEFAULT)