On 08/04/15 19:11, Neal Becker wrote:

I've been using 2 screens (laptop + external) for some time.

It's worked OK for some time, but recently (some update?) it's working less well.

After using just the laptop, I connect the monitor. In the past, kde doesn't notice and I need to run xrandr to turn on the monitor. Now, it seems to turn on monitor (after a bit of delay), but the laptop screen then has no background (just black), and right click on laptop background does nothing. Running xrandr doesn't fix it. Only logoff/logon fixes it.

This may or may not be relevant/helpful.

I run a 2 screen desktop and occasionally the background on the secondary screen will be lost and I'll have only black. I can move windows on the screen and they work fine.

To get the background back I simply run...

killall -9 /bin/plasmashell ; /bin/plasmashell --shut-up &

which is in a shell script.