Unexpected PCIE Downgrades of the NVIDIA Gpu

[RealAstolfo]

NAME="Pop!_OS"
VERSION="22.04 LTS"
ID=pop
ID_LIKE="ubuntu debian"
PRETTY_NAME="Pop!_OS 22.04 LTS"
VERSION_ID="22.04"
HOME_URL="https://pop.system76.com"
SUPPORT_URL="https://support.system76.com"
BUG_REPORT_URL="https://github.com/pop-os/pop/issues"
PRIVACY_POLICY_URL="https://system76.com/privacy"
VERSION_CODENAME=jammy
UBUNTU_CODENAME=jammy
LOGO=distributor-logo-pop-os

Issue occurred on Gentoo and PopOS, safe to assume it happens on any linux distro

Related Applications:
Any game utilizing the nvidia graphics card at a mid/high graphics cost

Issue/Bug Description:
Reporting as a bug, but im pretty sure its actually a feature of PCIE ASPM that is getting in the way.
The PCI Express lane downgrades from 4 x8 to 1 x8, causing sub par graphics performance and gpu% to maximimize

Steps to reproduce (if you know):
Play any game on the nvidia graphics card in fullscreen and wait for the PCI Express lane downgrade to occur. (EVEN ON AC)

Expected behavior:
No PCIE downgrade

Other Notes:
Fix/ Workaround

echo "on" > /sys/bus/pci/devices/0000:01:00.0/power/control
echo "on" > /sys/bus/pci/devices/0000:01:00.1/power/control
echo "0" > /sys/bus/pci/devices/0000:01:00.1/link/l0s_aspm
echo "0" > /sys/bus/pci/devices/0000:01:00.1/link/l1_1_aspm
echo "0" > /sys/bus/pci/devices/0000:01:00.1/link/l1_2_aspm
echo "0" > /sys/bus/pci/devices/0000:01:00.1/link/l1_aspm

The above has successfully fixed problems i mentioned above where games in fullscreen would suddenly be put down to sub-par FPS on the oryx pro (oryp10)

recommendation:
add the above commands to the system76-power performance profile

[crawfxrd]

This should probably be in system76/firmware-open. ASPM can be disabled in coreboot.

[RealAstolfo]

This should probably be in system76/firmware-open. ASPM can be disabled in coreboot.

do you have additional details on how this option is implemented? i did find it kinda bizzare with the lack of options in the bios on my oryx pro considering what coreboot should have. not to mention ASPM is good to have, just need a way to better control when it should not be conserving power on specific components. (i dont need full power wifi and bluetooth in a single player game as an example)