I have been having the same problem for my laptop. Dell Inspiron 1520 with an NVIDIA 8600GT graphics card.
All the 3D effects work fine, but when opening/closing windows or maximizing/minimizing it is extremely slow.
Also, the buttons for closing maximizing and minimizing have been slow to respond.
I believe I have either solved or worked around the problem though.
My system began functioning very except for two of the window animations when I installed the xserver-xgl package.
The two slow effects were the flame and beam up effects; they seem to be working a little better now thanks to Rodrigo Donado by disabling the Fading Windows effect.
WARNING: after enabling the xserver-xgl package, I have been unable to use the built in screen resolution utility and the glow around the windows disappeared.
I have been having the same problem for my laptop. Dell Inspiron 1520 with an NVIDIA 8600GT graphics card. minimizing it is extremely slow.
All the 3D effects work fine, but when opening/closing windows or maximizing/
Also, the buttons for closing maximizing and minimizing have been slow to respond.
I believe I have either solved or worked around the problem though.
My system began functioning very except for two of the window animations when I installed the xserver-xgl package.
The two slow effects were the flame and beam up effects; they seem to be working a little better now thanks to Rodrigo Donado by disabling the Fading Windows effect.
WARNING: after enabling the xserver-xgl package, I have been unable to use the built in screen resolution utility and the glow around the windows disappeared.