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After waking my computer up from suspend, I was confronted with this:
It is reproducible, however the second time, it looked slightly different:
Notice the strange edges of all open windows, which seem to be showing the receptive area of the windows (perhaps the part that measures how close they are to other windows for snapping into place?)
Has anyone seen this before and is it a known issue, with a solution?
I haven't been able to find this problem explained anywhere else - perhaps because I don't know what to search for.
This machine has a newly installed Ubuntu 16.04 running on an Intel 6850k with an Nvidia graphics card using the driver 375 (installed via ppa).