I tried to install laptop-mode-tools on my Cauldron version.  All rpms were updated as of today, April 22, 2012 so this is Mageia 2 Beta 3+.  

It seems laptop-mode-tools has a dependency problem, where it wants to install a different version of kde4-config, causing all of KDE to get uninstalled.  It wants kde4-netbook-config or kde4-vanilla-config. 

I was able to install laptop-mode-tools manually by downloading it and running "rpm -i --nodeps laptop-mode-tools" and it works fine, so the problem is in the dependencies I think. 

Here is the log of what happened when I tried to install it via Control Center: 

The following packages have to be removed for others to be upgraded:
Default-kde4-config-2-0.20120411.4.mga2.noarch
 (due to missing telepathy-kde-presence-applet)
akonadi-kde-4.8.2-1.mga2.x86_64
 (due to missing libkdecore.so.5()(64bit),
  due to missing libkcalcore.so.4()(64bit),
  due to missing libkcalutils.so.4()(64bit),
  due to missing libmicroblog.so.4()(64bit),
  due to missing libkpimutils.so.4()(64bit),
  due to missing libkmime.so.4()(64bit),
  due to missing libakonadi-kmime.so.4()(64bit),
  due to missing libakonadi-kde.so.4()(64bit),
  due to missing libkabc.so.4()(64bit),
  due to missing libkresources.so.4()(64bit),
  due to missing libkcal.so.4()(64bit),
  due to missing libakonadi-kcal.so.4()(64bit),
  due to missing libakonadi-notes.so.4()(64bit),
  due to missing libmailtransport.so.4()(64bit),
  due to missing libkpimtextedit.so.4()(64bit),
  due to missing libkpimidentities.so.4()(64bit),
  due to missing libkalarmcal.so.2()(64bit),
  due to missing libakonadi-contact.so.4()(64bit),
  due to missing libkimap.so.4()(64bit),
  due to missing libkmbox.so.4()(64bit),
  due to missing libakonadi-calendar.so.4()(64bit),
  due to missing libmaildir.so.4()(64bit),
  due to missing libkdepim-copy.so.4()(64bit),
  due to missing libakonadi-filestore.so.4()(64bit),
  due to missing libkmindexreader.so.4()(64bit),
  due to missing libakonadi-xml.so.4()(64bit),
  due to missing libkcmutils.so.4()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libnepomuk.so.4()(64bit),
  due to missing libkrosscore.so.4()(64bit),
  due to missing libknewstuff3.so.4()(64bit),
  due to missing libkio.so.5()(64bit),
  due to missing libknotifyconfig.so.4()(64bit),
  due to missing libkidletime.so.4()(64bit))
amarok-2.5.0-3.mga2.x86_64
 (due to missing libkdecore.so.5()(64bit),
  due to missing libamarokcore.so.1()(64bit),
  due to missing libamaroklib.so.1()(64bit),
  due to missing libamarok-sqlcollection.so.1()(64bit),
  due to unsatisfied amarok-utils == 3:2.5.0-3.mga2,
  due to missing kde4-audiocd,
  due to missing libkcmutils.so.4()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libkio.so.5()(64bit),
  due to missing libkdnssd.so.4()(64bit),
  due to missing libplasma.so.3()(64bit),
  due to missing libkdewebkit.so.5()(64bit))
amarok-utils-2.5.0-3.mga2.x86_64
 (due to missing libkdecore.so.5()(64bit))
ark-4.8.2-1.mga2.x86_64
 (due to missing kdebase4-runtime,
  due to missing libkdecore.so.5()(64bit),
  due to missing libkonq.so.5()(64bit),
  due to missing libkerfuffle.so.4()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libkfile.so.4()(64bit),
  due to missing libkio.so.5()(64bit),
  due to missing libkparts.so.4()(64bit),
  due to missing libkhtml.so.5()(64bit))
bluedevil-1.3-0.rc1.2.mga2.x86_64
 (due to missing kdebase4-runtime,
  due to missing libkdecore.so.5()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libkfile.so.4()(64bit),
  due to missing libkio.so.5()(64bit))
dolphin-4.8.2-1.mga2.x86_64
 (due to missing kdebase4-runtime,
  due to missing libkdecore.so.5()(64bit),
  due to missing kfind,
  due to missing libkonq.so.5()(64bit),
  due to missing libdolphinprivate.so.4()(64bit),
  due to missing kdebase4-common,
  due to missing libkcmutils.so.4()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libnepomuk.so.4()(64bit),
  due to missing libkfile.so.4()(64bit),
  due to missing libknewstuff3.so.4()(64bit),
  due to missing libkio.so.5()(64bit),
  due to missing libnepomukutils.so.4()(64bit),
  due to missing libnepomukquery.so.4()(64bit),
  due to missing libkparts.so.4()(64bit))
dragonplayer-4.8.2-4.mga2.x86_64
 (due to missing kdebase4-runtime,
  due to missing libkdecore.so.5()(64bit),
  due to missing libkdeui.so.5()(64bit),
  due to missing libkio.so.5()(64bit),
  due to missing libkparts.so.4()(64bit))
dragonplayer-handbook-4.8.2-4.mga2.noarch
 (due to unsatisfied dragonplayer >= 3:4.8.2-4.mga2)

...etc