plugins bailer and detection enabled after upgrade causing screen flickering and corruption

[Jean-Baptiste Lallement]

Oneiric to Precise upgrade

This is one instance of bug 963633 but I file it separately to avoid the confusion of the forementioned bug that is accumulating possible different causes.

TEST CASE:
1. Install a fresh Oneiric and apply updates
2. Change some settings to make sure they are preserved on upgrade (background, trackpad settings, ...)
3. Upgrade to Precise:
   $ update-manager -d
4. Proceed with the upgrade and reboot
5. Login

ACTUAL RESULT:
The screen is flickering, there is massive display corruption, a black strip appears below the panel.
unity --reset fixes the problem

Comparing the configuration after upgrade and after the reset shows that the plugins bailer and detection were active and disabling thme fixes the issue.

Here is the list of plugins active after upgrade (in that order):
core
bailer
detection
composite
opengl
compiztoolbox
decor
snap
imgpng
resize
move
unitymtgrabhandles
regex
mousepoll
grid
vpswitch
animation
gnomecompat
expo
place
wall
fade
workarounds
session
scale
ezoom
unityshell

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic i686
.tmp.unity.support.test.0:

ApportVersion: 1.95-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Mon Mar 26 22:19:29 2012
DistUpgraded: 2012-03-26 21:42:05,815 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20111009)
MachineType: Dell Inc. Inspiron N4010
ProcEnviron:
 TERM=xterm
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=bcb6a6ab-2b7e-4197-9880-df50199e10ec ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-03-26 (0 days ago)
dmi.bios.date: 01/19/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 021CN3
dmi.board.vendor: Dell Inc.
dmi.board.version: A11
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A11
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd01/19/2011:svnDellInc.:pnInspironN4010:pvrA11:rvnDellInc.:rn021CN3:rvrA11:cvnDellInc.:ct8:cvrA11:
dmi.product.name: Inspiron N4010
dmi.product.version: A11
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.2-0ubuntu1
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/965677

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 963093, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.