Xorg high CPU usage

[madmanZ]

Hello.

When i leave system locked by KDE `kscreenlocker` i got extremely high CPU usage by /usr/bin/X. If system restarted - all work fine, for next long lock screen session. If screen locked for 1-2 hours - all fine, but if system was locked for night, Xorg going crazy.

Card: 01:00.0 VGA compatible controller: nVidia Corporation GT215 [GeForce GT 240] (rev a2)

drivers: 295.17-0ubuntu1~xedgers~oneiric1

kernel: 3.2.5-zen (zen-kernel.org)

xorg.conf:
Section "Screen"
Identifier "Default Screen"
DefaultDepth 24
EndSection

Section "Module"
Load "glx"
Load "GLcore"
EndSection

Section "Device"
Identifier "Default Device"
Driver "nvidia"
Option "NoLogo" "True"
Option "RenderAccel" "True"
Option "UseEvents" "True"
Option "BackingStore" "True"
Option "TripleBuffer" "True"
Option "AllowIndirectPixmaps" "True"
Option "PixmapCacheSize" "200000"
EndSection

Section "Serverflags"
Option "DontZap" "True"
EndSection

strace, ltrace - http://dl.dropbox.com/u/6714110/files.tar.bz2

Please, help to curb Xorg appetite.