X server crash after logging in for second time in kde(while effects are enabled)

[Boban Aleksov]

If i disable desktop effects in kde there is no crash.
Crash is happening every time. I login for the first time everything is fine, logout, then try to login and X crashes returning me to the kdm login.
After crash, i can log in, and effects are disabled. When i go to system settings/desktop effects it says kwin had crashed and i have to confirm that i want effects to be enabled.
Had no problem with 11.04 whatsoever.
HP 4520s Intel p4500 celeron Intel HD

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Date: Sun Oct 16 01:41:01 2011
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Thilo-Alexander Ginkel (thilo.ginkel)]

I am seeing the same behavior with xserver-xorg-video-intel on Kubuntu 11.10 64-bit. So far I have been unable to get a backtrace in kdm.log with symbols, so any hint how to enable then (apart from installing -dbg packages for xserver-xorg-video-intel) is much appreciated!

[jhoechtl (johann-hoechtl)]

Confirm this bahaviour, and it also affects me. Upon first login desktop effects remain active, switching desktop effects (alt-shift-f12) or logout and login again crashes kdm. Next login will be without desktop effects enabled.