[Bug 280839] New: Computer is busy for nothing, source cannot be identified.

[Kalsan]

https://bugs.kde.org/show_bug.cgi?id=280839

           Summary: Computer is busy for nothing, source cannot be
                    identified.
           Product: kde
           Version: 4.6
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: info.kalsan at valaiscom.ch


Created an attachment (id=63156)
 --> (http://bugs.kde.org/attachment.cgi?id=63156)
Screenshot of the busy machine running nothing but rsync

Version:           4.6 (using KDE 4.6.2) 
OS:                Linux

The attached screenshot shows the state of my computer during a simple rsync
from the internal HDD to an external HDD. To the left top corner, you can see
in the performance widgets that the actual CPU is 100% on my 2-core processor.
However, the "task manager" shows only minimal CPU action. Before the
screenshot, several programs were run and quit. At the time of the screenshot,
the only active user process was rsync, but the computer was so busy that it
had even problems moving the mouse cursor (jumping cursor due to overload). The
phenomene happens often when I multitask and keeps going for several minutes
even though I closed the programs. Mostly, the next boot of the computer is
very slow and sometimes, it crashes.

Reproducible: Sometimes

Steps to Reproduce:
Multitask on Plasma

Actual Results:  
Computer busy, but no process seems to be responsible

Expected Results:  
Possibility 1: Show in the "Task-Manager" what process is slowing the machine
down
Possibility 2: Not being busy.

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