I can confirm this (1 minute high load) for manually creating and using a .Xmodmap file for my fedora 23 with Xfce 4.12.
simple commands xmodmap -pke > .Xmodmap xmodmap .Xmodmap in home directory produce it -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/998310 Title: .Xmodmap file makes xorg temporarily reach high cpu usage (90%-100%) after resume or when coming back from tty to X session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/998310/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs