Dell’s Inspiron 1525 laptop has ” Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller” display controller..
u can see this by typing command:
lspci | grep Display
this display controller is black listed in compiz fusion..i have compiz-fusion installed on my laptop with UBUNTU gutsy-gibbon..and i couldn’t enable the effects..so what to do..??? I just modified ” /usr/bin/compiz ” to remove the blacklisting.. 
..
sudo gedit /usr/bin/compiz
there you can see a separate section for blacklist
1 : # blacklist based on the pci ids
2 : # See http://wiki.compiz-fusion.org/Hardware/Blacklist for details
3 : T=” 1002:5954 1002:5854 1002:5955″ # ati rs480
4 : T=”$T 1002:4153″ # ATI Rv350
5 : T=”$T 8086:2982 8086:2992 8086:29a2 8086:2a02 8086:2a12″ # intel 965
6 : T=”$T 8086:2972″ # i965 (x3000)
7 : T=”$T 1002:3152 1002:3150 1002:5462 1002:5653 ” # ati X300 X600,X600 X700
8 : BLACKLIST_PCIIDS=”$T”
9 : unset T
( * the line numbers are not according to the file.. )
Now comment out the lines 5 and 6..and you are set..But fixing this breaks the video playback… 
..temporary solution on playback recovery is changing gstreamer-properties..
press alt+F2 and type “gstreamer-properties” without quotes..
In the Video section change the “Default Output plugin” to “ no Xv “..
so it will recover the video playback but again its a temporary solution..
very informative…..nice
Nice work. Thanks