** Also affects: gdm3 (Ubuntu) Importance: Undecided Status: New ** Description changed:
OS: Ubuntu 18.04 bionic Kernel: x86_64 Linux 4.15.0-20-generic - DE: GNOME + DE: GNOME CPU: Intel Core i5-7200U @ 4x 3.1GHz GPU: Intel HD 620 + NVIDIA GeForce 940MX (Optimus) UEFI boot, Secure Boot disabled. I installed the proprietary graphics driver with Software Properties and Vulkan applications (e.g. vulkan-smoketest, Unreal Editor, SDK examples, Dolphin) were working fine. To get rid of tearing I added nvidia-drm.modeset=1 to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub, then ran update-grub && update-initramfs -u and rebooted. After doing that, Vulkan applications stopped working because they couldn't initialize the Vulkan swap chain until I reverted the changes to GRUB. - Other GNU/Linux distributions such as Manjaro don't seem to be affected - which is why I'm reporting this here. + Everything works fine if lightdm is used instead of gdm3. ** Summary changed: - Vulkan not working if nvidia-drm.modeset=1 is set (Optimus) + Vulkan not working if nvidia-drm.modeset=1 is set and gdm3 is used (Optimus) ** Description changed: OS: Ubuntu 18.04 bionic Kernel: x86_64 Linux 4.15.0-20-generic DE: GNOME CPU: Intel Core i5-7200U @ 4x 3.1GHz GPU: Intel HD 620 + NVIDIA GeForce 940MX (Optimus) UEFI boot, Secure Boot disabled. I installed the proprietary graphics driver with Software Properties and Vulkan applications (e.g. vulkan-smoketest, Unreal Editor, SDK examples, Dolphin) were working fine. To get rid of tearing I added nvidia-drm.modeset=1 to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub, then ran update-grub && update-initramfs -u and rebooted. After doing that, Vulkan applications stopped working because they couldn't initialize the Vulkan swap chain until I reverted the changes to GRUB. - Everything works fine if lightdm is used instead of gdm3. + Everything works as expected if lightdm is used instead of gdm3. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769857 Title: Vulkan not working if nvidia-drm.modeset=1 is set and gdm3 is used (Optimus) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1769857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs