Q: _OSC failed (AE_ERROR); disabling ASPM I get this dmesg message, what does it mean?

acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM

Info:
$ uname -a
Linux marco-Lenovo 4.15.0-50-generic #54-Ubuntu SMP Mon May 6 18:46:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux


A: 
This error message occurs when the kernel runs the root PCI bridge
  _OSC control method in your firmware and the execution fails, perhaps due to a bug in the firmware or perhaps it does not exist. The kernel
  hence cannot determine the features supported or capabilities provided
  by the device (as specified by your firmware) and hence has to disable
  PCIe ASPM (Active State Power Management).
The downside of Active State Power Management not being enabled is
  that the machine is less power efficient, however, one can force this
  on with the kernel boot parameter "pcie_aspm=force" however, forcing
  this on may cause system lockups.

Source
