You might also try alternating with ALT-TAB, that also seems to help.
On Sat, Sep 5, 2015 at 8:46 AM, Gerald B. Cox <gbcox(a)bzb.us> wrote:
On Sat, Sep 5, 2015 at 8:24 AM, Ed Greshko <ed.greshko(a)greshko.com> wrote:
> Well, for me at least, the killall plasmashell ; plasmashell is only
> meaningful when the entries on my systray disappear or when the background
> images go to black. When my system hits the "freeze" no keyboard input is
> possible.
I've found I am able to usually break out with ALT-F2 - sometimes it takes
10, 15 or more times, but eventually I get the command box.