What do you have your AGGRESSION set to?
Tweak that up a notch or two at a time and see the tradeoff between GPU utilization and display responsiveness.

Also, check out the mining forums for the threads on how to get Cat 11.6 installed; ubuntu installs an older driver level that doesn't let you exceed those limits you posted the dump of.  It also installs the driver in a non-standard way, but there's a Cat installation wiki that tells you how to get from the ubuntu-installed driver to a generic install.  If you have a hard time finding the posts, check my "see all posts by" I posted a link to it a couple of days ago.