[Bug 1422185] [NEW] Plasma 5 freezes after 3 mins

[David Mackenzie]

Public bug reported:

I upgraded to Plasma 5 using both the ppa:kubuntu-ppa/next and the ppa
:kubuntu-ppa/next and a second time using ppa:kubuntu-ppa/next-
backports.

After login everthing looks and works great. However about 3 minutes
after either using or not using the system, it freezes. I can move the
mouse, but can't click anything, nor use any keyboard shortcuts like
Alt+F2. I've checked /var/log/syslog and xorg logs which don't show
anything.

The Bug is similar to the following bug, however, Alt+Tab or any other
key combination does not unfreeze the desktop:

https://bugs.launchpad.net/kubuntu-ppa/+bug/1384512

My system is:

Clevo Laptop
Intel i7 4th Gen Processor Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
Nvidia Graphics (with Optimus) GeForce GTX 850
Kubuntu 14.10

Any assistance would be greatly appreciated. Included advice on what log
files to check.

** Affects: kubuntu-ppa
     Importance: Undecided
         Status: New

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Title:
  Plasma 5 freezes after 3 mins

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