Comment 0 for bug 876762

I have a HP DV6 6121tx laptop, with Intel Core i7 sandybridge and a discrete GPU (Ati 6770m) and an Intel GPU.

Whenever I login to Kubutu with desktop effects enabled, X crashes at the KDE splash screen and drops back to the login screen (kdm). Any subsequent logins work since KDE automatically disabled desktop effects after a crash.

However, if I login with effects disabled and enable then _after_ logging in then everything works fine until I logout.
I've also tested compiz, and it works without any problems.

Here's some more info:

$ lspci -vnn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09)(prog-if 00 [VGA controller])
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Whistler XT [AMD Radeon HD 6700M Series] [1002:6740] (prog-if 00 [VGA controller])

$ uname -r
3.0.0-12-generic

$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.15.901-1ubuntu2
  Candidate: 2:2.15.901-1ubuntu2
  Version table:
 *** 2:2.15.901-1ubuntu2 0
        500 http://in.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Tue Oct 18 00:25:22 2011
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20111007)
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, user)
 LANG=en_IN
 SHELL=/bin/zsh
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)