Good news. It should be noted that Ubuntu has included this fix since their distro version 3.0.0-13, and other distros may have backported the fix, too. But now it's in mainline.
"The patch only has this effect on systems with the firmware problem detailed above, which can be identified by using dmesg to display kernel messages and looking for the message "ACPI FADT declares the system doesn't support PCIe ASPM, so disable it"." >> Not for all!