A temporary workaround is to switch gdm to another display manager Well there is another problem when you update the drivers on Intel you can't open the nvidia settings, just save the old nvidia-settings and libs from /use/lib
On Ubuntu 18.04 is present only if you update the drivers from the repo, the only way to use gdm is that. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-390 in Ubuntu. https://bugs.launchpad.net/bugs/1800465 Title: Vulkan error when using NVIDIA-Prime Status in NVIDIA Drivers Ubuntu: New Status in nvidia-graphics-drivers-390 package in Ubuntu: Confirmed Status in nvidia-prime package in Ubuntu: Confirmed Bug description: After installing Ubuntu 18.10 and the Nvidia driver + Vulkan-Utils, switching to NVIDIA and then running vulkaninfo or vulkan-cube works perfectly. But when you reboot and update, then switch to Intel, then back to Nvidia, all Vulkan programs give an "Assertion `!err' failed." Vulkaninfo: ======= Presentable Surfaces: ===================== GPU id : 0 (GeForce GTX 960M) Surface type : VK_KHR_xcb_surface vulkaninfo: /build/vulkan-tools-ZnxIl9/vulkan-tools-1.1.82.0+dfsg1/vulkaninfo/vulkaninfo.c:1253: AppDumpSurfaceFormats: Assertion `!err' failed. Annullato (core dump creato) Vulkancube: vulkan-cube: /build/vulkan-tools-ZnxIl9/vulkan-tools-1.1.82.0+dfsg1/cube/cube.c:3416: demo_init_vk_swapchain: Assertion `!err' failed. Annullato (core dump creato) I still have not found a workaround for that, the only way to get it working again is to reinstall everything. - Install Ubuntu 18.10 - Install proprietary 390 NVIDIA drivers - Switch NVIDIA-Prime to NVIDIA - Testing the vulkan capabilities works - Updating the system then switching to intel - Reboot - Switch to nvida - Now all Vulkan programs when using NVIDIA give that error To manage notifications about this bug go to: https://bugs.launchpad.net/nvidia-drivers-ubuntu/+bug/1800465/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
