verified kernel 4.15-rc2 with this patch, 3 X 4K works well. https://patchwork.kernel.org/patch/10097883/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1714178 Title: Triple monitor display failed with Dell Dock (HiDPI) (modesetting) To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1714178/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs