I had the same problem on my Dell XPS M1330 with the intel cart. I updated this packages :
ibglu1-mesa libgl1-mesa libgl1-mesa-glx mesa-utils
I use the debian packages in Sid (version 7.4-2 ) , and I updated the intel driver in the Sid repository.
I don't have any freeze after that (and I use the Desktop effect)
I had the same problem on my Dell XPS M1330 with the intel cart. I updated this packages :
ibglu1-mesa
libgl1-mesa
libgl1-mesa-glx
mesa-utils
I use the debian packages in Sid (version 7.4-2 ) , and I updated the intel driver in the Sid repository.
I don't have any freeze after that (and I use the Desktop effect)