Re: Higher power consumption in Debian than in Ubuntu - ASPM disabled instead of enabled for 2 modules (lspci), but why?

["B.M." <b-misc@gmx.ch>]

On Mittwoch, 21. Dezember 2022 18:37:20 CET you wrote:
> Dear all,
>
> Comparing power consumption with powertop for a brand new Dell laptop I
> found out that Debian is consuming about 6 Watts while Ubuntu is consuming
> 3 Watts (idle). Comparing configs I just found out that lspci -vv reports
> ASPM enabled 6 x for Ubuntu and 4 x for Debian. The differences are:
>
> Ubuntu:
> Non-Volatile memory controller
> ASPM L1 Enabled
> Kernel driver in use: nvme
>
> PCI bridge: Intel Corp 12th Gen....
> ASPM L1 Enabled
> Kernel driver in use: pcieport
>
> Debian:
> Non-Volatile memory controller
> ASPM Disabled
> Kernel driver in use: nvme
>
> PCI bridge: Intel Corp 12th Gen....
> ASPM Disabled
> Kernel driver in use: pcieport
>
> So the exact same driver is been used and I didn't find any config within
> /etc/ modprobe.d or /etc/modules or /etc/modules-load.d with respect to
> these modules.
>
> Do you have an idea why this happens (same computer, so BIOS settings should
> have no impact)?
>
> Thank you very much.
>
> Best regards,
> Bernd

OK, problem solved: with the boot parameter pcie_aspm=force I get the very
same 3 W with Debian as with Ubuntu :-)

Best,
Bernd