Using the 2.6.36 kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.36-maverick/linux-image-2.6.36-020636-generic_2.6.36-020636.201010210905_amd64.deb seems to have fixed it for me. (T400, Intel 4500MHD graphics)
Using the 2.6.36 kernel from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v2.6.36- maverick/ linux-image- 2.6.36- 020636- generic_ 2.6.36- 020636. 201010210905_ amd64.deb seems to have fixed it for me. (T400, Intel 4500MHD graphics)