OK, thanks. Assuming the bug isn't just hiding and wouldn't reappear later in 18.04.3 if used long enough, then this implies a fix exists somewhere in the HWE packages (which are the difference between 18.04 fully updated and 18.04.3 fully updated).
The only two sets of HWE packages I can think of that affect graphics are Xorg and the kernel. Firstly Xorg: Does the bug occur if you log into "Ubuntu on Wayland" instead? Secondly the kernel: Does the bug occur if you install the latest test kernel packages from here? https://kernel.ubuntu.com/~kernel- ppa/mainline/v5.5-rc7/ Remember to run 'uname -a' to check which kernel is active. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1860483 Title: [nouveau] screen background overlaid with scan type artifact in red To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860483/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
