The bug does not appear with a TWM session nor with a LXDE session. Thus I think that we can safely conclude that this is in fact not a kernel bug.
In my case it occurs only with gnome-shell. ** Tags removed: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1600371 Title: Gnome freezes for some seconds on simultaneous touch and stylus input (palm rejection fails) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1600371/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs