How many displays do you run Stephen?  Do they ever disconnect, or go away like a laptop being detached between home and work?

Do you use kde display to manage them, nvidia-settings, some combination of both?  Do you have it write an xorg.conf?

Quick test if you'd humor me - detach a display hard that the system is setup for, and tell me how bad kde freaks out in moving stuff around if you do so a few times.  Even better, detach all of them, and reconnect them all back, which is what mine effectively do.  My samsung tv's show disconnected to the gpu when I power them down, so the desktop is essentially left with "no displays", and then loses its mind.

KDE usually handles me disconnecting displays once, randomly moving the task bar around, resetting my wallpapers, and moving my in-use windows about.  It puts things back in a pretty wishy-washy fashion, but another disconnect of the displays causes it to lose its mind entirely, crashing to usually even get displays showing anything again.  Reboot time then.

I went to 16.04 with plasmas 5 because plasma4 was so fundamentally broken with xrandr it would never work right for placement of displays (abandoned support for kde4), and plasma5 while attempts to, is still horribly broken it seems.  Can't seem to win with it.

There is a novel-length bug posted on this behavior myself and others have been posting information to KDE folks for, but oddly just doesn't seem most people have run into this when displays "go away".

https://bugs.kde.org/show_bug.cgi?id=356225

-mb

On 11/25/2016 03:01 PM, Stephen Partington wrote:

I have had no issues running Kbuntu and the 1070 with the binary drivers from repo.

On Fri, Nov 25, 2016 at 3:00 PM, Michael Butash <mike@butash.net> wrote:

So far I am NOT impressed with my choice to go with nvidia, as the graphics change from amd has caused everything to become entirely unstable again.