I'm seeing this exact behaviour on my laptop. I run the Xorg-edgers PPA since a couple of months that PPA also provides the LTS-backport kernel (quantal? kernel) so, that kernel is quite recent (3.5.x with backports). If needed I can run the latest 3.6-rc from the mainline kernel PPA.
Do you want me to provide the logs with the backport or latest rc kernel?
I'm seeing this exact behaviour on my laptop. I run the Xorg-edgers PPA since a couple of months that PPA also provides the LTS-backport kernel (quantal? kernel) so, that kernel is quite recent (3.5.x with backports). If needed I can run the latest 3.6-rc from the mainline kernel PPA.
Do you want me to provide the logs with the backport or latest rc kernel?