This might be related to bug 1875285 but your analysis of cropping at the 16384 boundary sounds more likely.
For other related bugs, please refer to this list: https://bugs.launchpad.net/ubuntu/+bugs?field.tag=xrandr-scaling but realistically for a desktop bigger than 16K I think the only way forward is Wayland. Unfortunately Nvidia has a few problems with Wayland at the moment which is why it's not the default: https://bugs.launchpad.net/ubuntu/+bugs?field.tag=nvidia-wayland ** Changed in: mutter (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2017323 Title: Triple 4K monitor setup with fractional scaling truncated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2017323/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
