dopo la modifica mi da questo:
:~$ dmesg | grep -i aspm
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=2fb9dde0-f27d-4685-b68e-9a82c20d76c3 ro quiet splash vt.handoff=7 pcie_aspm=force
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=2fb9dde0-f27d-4685-b68e-9a82c20d76c3 ro quiet splash vt.handoff=7 pcie_aspm=force
[ 0.000000] PCIe ASPM is forcedly enabled
[ 0.946714] ACPI FADT declares the system doesn’t support PCIe ASPM, so disable it