Well. Finally I found the way to make works it.
I did change the /etc/X11/xorg.conf file, Now it's working fine
Let me show you: with this configuration the system is working like with
Intrepid.
Section "Device"
Identifier "Configured Video Device"
Boardname "ATI Radeon"
Busid "PCI:1:0:0"
Driver "radeon"
Screen 0
Vendorname "ATI"
Option "MergedFB" "off"
Option "AccelMethod" "EXA"
Option "EXANoComposite" "false"
Option "FBTexPercent" "50"
Option "MigrationHeuristic" "greedy"
Option "DRI" "true"
Option "GARTSize" "256"
Option "AGPMode" "4"
Option "Colortiling" "On"
EndSection
Section "DRI"
Mode 0666
EndSection
Section "ServerLayout"
Identifier "Default Layout"
screen 0 "Default Screen" 0 0
Option "AIGLX" "true"
EndSection
Section "Extensions"
Option "Composite" "Enable"
EndSection
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
EndSection
** Attachment added: "xorg.conf"
http://launchpadlibrarian.net/28273755/xorg.conf
--
IBM Thinkpad T40 - Video ATI Technologies Inc Radeon Mobility M7 LW [Radeon
Mobility 7500]
https://bugs.launchpad.net/bugs/353996
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