Michael Lampe wrote:
In other words: my BIOS is broken. But it's broken for all Lenovo Notebooks. So ...
It seems mine is particularly broken: The BIOS isn't even lying, it realy disables ASPM!
That at least is my conclusion after looking at this
https://wiki.edubuntu.org/Kernel/PowerManagementASPM
and a closer inspection of 'lspci -vvv'.
The backported patch may be correct after all.
It may be a candiate for centosplus kernel.
If someone else wants to test: I can upload a kernel with this patch applied.
-Michael