It would be great if someone tells to our poor souls how to manually detect if a motherboard has a faulty bios implementation and does not expose correctly pcie aspm.
On my HP DV5 with AMD configuration (two years old notebook) adding pcie_aspm=force to my kernel boot options simply doesn't produce anything valuable in dmesg.
The same happens on a HP Probook with an intel i3 sandy bridge processor (three months old notebook).
Saving power in a data center is important of course, but ASPM isn't going to help out here.
I have spoken with Gigabyte about broken ASPM and this was his response.
Thank you for your kindly mail and inquiry. About the issue you mentioned, since our products only support Windows OS, we do not receive proper driver from chipset vender, we cannot guarantee Linux to work on our system. We suggest you to install Windows OS to prevent having problems. If you install the Windows OS and still have any problems, please provide the error message screenshot for us, so we can try to see how to help. Sorry for the inconvenience.
Asus M4N68T LE V2 also affected, but now there's fixed kernels so it's not such a problem.