This is most likely due to bug #1073062, fglrx can't build a module.
"update-initramfs: Generating /boot/initrd.img-3.7.0-030700rc2-generic modprobe: ../tools/modprobe.c:550: print_action: Assertion `kmod_module_get_initstate(m) == KMOD_MODULE_BUILTIN' failed. Aborted (core dumped)"
This is most likely due to bug #1073062, fglrx can't build a module.
"update-initramfs: Generating /boot/initrd. img-3.7. 0-030700rc2- generic modprobe. c:550: print_action: Assertion `kmod_module_ get_initstate( m) == KMOD_MODULE_ BUILTIN' failed.
modprobe: ../tools/
Aborted (core dumped)"