[Bug 1571036] [NEW] kubuntu 15.10: screen occasionally freezes when desktop lock is activated

[Kent Yoder]

Public bug reported:

Sometimes when I click the lock icon or activate screen lock with the
hotkey combo to lock my desktop, I get the following behavior:  the
image on the screen freezes, mouse still moves but is unable to interact
with anything (focus doesn't change, clicks have no effect).  Once the
display is in this state, I have to switch to a virtual console and
reboot the machine to get a functional desktop back.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: kded5 5.15.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Apr 15 13:35:16 2016
SourcePackage: kded
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: kded (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug wily

** Attachment added: "dmesg after the display freezes"
   https://bugs.launchpad.net/bugs/1571036/+attachment/4637856/+files/dmesg_bad.txt

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Title:
  kubuntu 15.10: screen occasionally freezes when desktop lock is
  activated

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