The issue persists when MUTTER_DEBUG_FORCE_KMS_MODE=simple has been added to /etc/environment. Note that Wayland is enabled; that is, /etc/gdm3/custom.conf has commented out the line reading WaylandEnable=false.
It may be relevant to note how the problem does not appear following a fresh reboot. There is a correlation with the use of SDL2 libraries. In fact, I am tracking down an issue in which a program that was stable in Ubuntu 22.04 is now experiencing segmentation faults when installed on Ubuntu 24.04. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2074559 Title: [nouveau] Top margin of secondary monitor covered with black flickering rectangle To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2074559/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs