disabling laptop monitor disables external monitor

Binary package hint: gnome-settings-daemon

On a Thinkpad X201 with external display port monitor:
Initially both laptop display and external monitor are active with same resolution.

System -> Preferences -> Monitor Preferences

Uncheck "Same image in all monitors".

Monitor: Laptop
Select 'Off'

Result: Both laptop display and external display turn off

Expected result: External display should remain off.

Workaround: disable gnome-settings-daemon randr and xsettings plugins. X will use the highest resolution by default.

cd /usr/lib/gnome-settings-daemon-2.0
mv libxrandr.so libxrandr.so.broken
mv libxsettings.so libxsettings.so.broken

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-settings-daemon 2.32.1-0ubuntu13.1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Wed Apr 20 08:52:28 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, username)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-settings-daemon
UpgradeStatus: No upgrade log present (probably fresh install)