Bugzilla Bug 264092

I can not find the solution for high cpu usage of plasma on my laptop.
it's started after regular upgrade of  my system i made at 26march.Here the
main packages were upgraded
xorg-server-1.5.3-r2 ->xorg-server-1.5.3-r5
x11-drivers/nvidia-drivers-180.37->x11-drivers/nvidia-drivers-180.41
x11-drivers/nvidia-drivers-180.41->x11-drivers/nvidia-drivers-180.41
sys-kernel/gentoo-sources-2.6.28-r3->sys-kernel/gentoo-sources-2.6.29
All these packages i tried to revert back , but this does not solve the
problem.There were also a bit of other packages upgraded, which I didn't try to
revert back (too lot small packages)

Reproducible: Always

Steps to Reproduce:
1. install latest kde 4.2.1 ebuilds, including plasma
2. create new user "testuser"
3. login to kde 4.2.1 as testuser .Leave all widgets plasma shows to you by
default

Actual Results:  
->from start plasma eats about 3% of cpu and in a 30 minutes it becomes about
75% and does not answer on any clicks


Expected Results:  
plasma has not use much cpu and hang

some stuff about my machine:
core2duo amd64bit system
kde 4.2.1
nvidia 7300Go with x11-drivers/nvidia-drivers-180.41
I would be glad for any suggestion or solution how to solve this problem

Created an attachment (id=186577) [details]
here is emerge --info from my machine

I tried to execute plasma with debug and nofork options , but didn't get any
valuable info

forgot to mention qt : I'am using QT-4.5

figured out that issue exists when kwin composite effects are enabled.
so it's specific to composite

Created an attachment (id=186588) [details]
here is xorg.conf

I can confirm that problem still exists if composite effects are disabled ,
hence reproduced not always after login. With composite it reproduces always.
Updgrade to nvidia-drivers-180.44 , which recently were released didn't solve
the problem

I'm getting a similar issue, text diappears from widgets and taskbar, etc, as
if plasma semi-crashed, but process remains.  After killing and running in
terminal, I get the following output: http://pastebin.com/m4a5cc1c6

emerge --info: http://dpaste.com/32895/

xorg.conf: http://dpaste.com/32896/

Problem existed on kde4.1.4, 4.2.1, and 4.2.2

I solve plasma problem by stoping hald service.
(kde-4.2.4 ~x86)

It's true about hald .. it seems I found also the reason of my laptop - I have
the broken web camera driver and /var/log/messages every 2 seconds updated with
 lines 
May  4 20:10:49 geonix-laptop [ 5446.249175] usb 1-4: new high speed USB device
using ehci_hcd and address 5
May  4 20:10:49 geonix-laptop [ 5446.390101] usb 1-4: New USB device found,
idVendor=046d, idProduct=0896
May  4 20:10:49 geonix-laptop [ 5446.390107] usb 1-4: New USB device strings:
Mfr=1, Product=2, SerialNumber=0
May  4 20:10:49 geonix-laptop [ 5446.390112] usb 1-4: Product: Camera
May  4 20:10:49 geonix-laptop [ 5446.390116] usb 1-4: Manufacturer: OEM
May  4 20:10:49 geonix-laptop [ 5446.390336] usb 1-4: configuration #1 chosen
from 1 choice
May  4 20:10:49 geonix-laptop [ 5446.390791] gspca: probing 046d:0896
May  4 20:10:49 geonix-laptop [ 5446.593505] vc032x: check sensor header 2c
May  4 20:10:49 geonix-laptop [ 5446.618965] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.651964] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.684961] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.726961] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.759958] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.792955] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.825959] vc032x: I2c Bus Busy Wait 0
May  4 20:10:49 geonix-laptop [ 5446.825964] vc032x: Unknown sensor...
May  4 20:10:49 geonix-laptop [ 5446.825992] vc032x: probe of 1-4:1.0 failed
with error -22
May  4 20:10:49 geonix-laptop [ 5446.826657] usb 1-4: USB disconnect, address 5

It seems hald constantly informs that new device appeared & dissapeared and kde
tries to turn on && turn off it.Don't mind - may it's performed by kde4 mount
applet , maybe by kdecore... But blacklist the webcamera driver solved the
problem for me...
kde guys should include some device check and give up if device was not
sucessfully turned on by 3'rd try for example

Try `chmod 755 -R /usr/share/kde4/` according to
https://bugs.gentoo.org/show_bug.cgi?id=261813