Does booting without the splash screen (remove the "splash" option from the kernel boot option in Grub) fix it ?
If so I've seen the same thing on another Intel graphics chipset laptop. -- Xorg D-states on initialisation https://launchpad.net/bugs/62113 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
