Thanks for the info.
First time, I tried that, but it has not improved in my environment.
I found that, when "Fusion-icon->Compiz options->Indirect Rendering" checkbox is on, 3D effects work.
compiz can disable the direct rendering by the checkbox.
But other applications (ex. 3D screensaves, blender, ... ) cause freeze as well as before.
It seems to be caused by kernel driver's lock, but it resumed by killing the freezed application.
I think that intel driver for i945 have some issue in the Direct Rendering function.
Thanks for the info. icon->Compiz options->Indirect Rendering" checkbox is on, 3D effects work.
First time, I tried that, but it has not improved in my environment.
I found that, when "Fusion-
compiz can disable the direct rendering by the checkbox.
But other applications (ex. 3D screensaves, blender, ... ) cause freeze as well as before.
It seems to be caused by kernel driver's lock, but it resumed by killing the freezed application.
I think that intel driver for i945 have some issue in the Direct Rendering function.