[Bug 296835] [NEW] konsole high cpu load when maximized

[memartin]

Public bug reported:

Binary package hint: konsole

I've upgraded to Intrepid only this weekend. I normaly have a fullscreen
console without any extras (menu/tab bar, deco, scrollbar all off) open
on one of my desktops that I use in KDE.

Today I've left for break and left my console desktop session open. When
I returned I noticed that my laptop fan, which I seldomly hear, was
running, Indicating me that something cpu heavy was going on for quite
awhile.

I started top on the console and saw Xorg taking up ~30 % user and ~20 %
system load. Fiddling around I found out that the load drops to normal
(~97 % idle) instantly when I switch to another desktop.

I suspected Konsole's transparency to have something to do with that,
but surprisingly that turned out not to be true. Load stays up
regardless of the transparency setting.

I then tried to figure out whether the problem was the Konsole window
overlapping my sysinfo plasmoid, and when I left fullscreen mode and
restored (de-maximized) Konsole to be a normal window again, the cpu
load dropped to normal in an instance.

So the odd thing is that I can toggle the behavior just by maximizing
and restoring Konsole.

I've decided not to file a bug with KDE since Intrepid ships with KDE
4.1.3 which seems to be some kind of hot build, not officially supported
yet by KDE. PCMIIW.

Cheerz, Martin

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

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konsole high cpu load when maximized
https://bugs.launchpad.net/bugs/296835
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