Yes, this bug wasn't present before 11.04.

This is when kernel 2.6.38 that disabled ASPM for everyone came in, but
when this bug was solved for quite everyone, I've started seeing this
issue. Only noticed it recently, because before I was still passing
pcie_aspm=force when booting the kernel. And I still see a difference in
consumption of 2W between the two modes, going down from 14 to 12 on
idle when forcing ASPM to be enabled.

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https://bugs.launchpad.net/bugs/1170836

Title:
  PCIe ASPM disabled while supported

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