[6.10.0-RC1] Unable to enable ASPM: it stays disabled even with policy and boot option (Ubuntu works, Unraid not)

Same issue like

The Kernel Update didn't change the behavior.

Currently, Tested Ubunutu Versions:

• Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
• Ubuntu 21.04
• Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210811)

Because the Kernel Version of Ubuntu 21.10 is very close to Unraid's 5.13.8 the lspci outputs are identical except for the ASPM part.

Steps to reproduce:

1. correctly configure bios to support ASPM
2. Don't install any unnecessary components, no hard drives connected, no add-in cards installed
3. prepair a fresh Ubuntu and set boot option intel_iommu=on to get same lspci output like unraid
4. check if ASPM is enabled

   lspci -vvvnnPPDq > ubunutu_lspci.txt
   lsmod > ubunutu_lsmod.txt
   modprobe -c > ubunutu_modprobe.txt
   cat /proc/modules > ubunutu_modules.txt

   ubunutu_lspci.txtubunutu_lsmod.txtubunutu_modprobe.txtubunutu_modules.txt

5. prepair unraid: add pcie_aspm=force to /boot/syslinux/syslinux.cfg
6. check if ASPM is enabled

   lspci -vvvnnPPDq > lspci.txt
   lsmod > lsmod.txt
   modprobe -c > modprobe.txt
   cat /proc/modules > modules.txt

   modules.txtmodprobe.txtlspci.txtlsmod.txt

Expected Result:

ASPM should be enabled like it is in Ubuntu to save 4W of power in idle

Actual Result:

It is still disabled

tower-diagnostics-20210811-2142.zip

I don't know which files could be interesting to find out what does prevent unraid from enabling ASPM. I thought maybe one of the kernel modules or configuration are differently and did export some of them. But lspci does already tell the ubuntu and unraid are using the same kernel modules.

Is there maybe a script somewhere in unraid which does disable ASPM to fix issues related to this option?

Ubuntu Kernel config and Syslog:

syslogconfig-5.11.0-20-generic