Arch Linux

Njobe

Member

Registered: 2025-10-05

Posts: 2

High idle power consumption on Lenovo Legion 5i gen 10 with 255HX

I recently bought a new Lenovo Legion 5i with Intel Arrow Lake 255HX and RTX 5070. I've installed Arch Linux with Hyprland.
This is a gaming laptop, so I don't expect ultra low power consumption, but usually it sits between 15 and 18 watts on idle. It seems a bit too much to me.
I tried several things. I have tlp, I tried auto-cpufreq, powertop tunables, I enabled all the usb/pci power management with udev rules, I disabled the watchdog, I enabled power management for the discrete GPU (it's always on D3Cold when not in use), etc...
I've set all the most power efficient settings in tlp for the cpu (powersave scaling governor, power energy/performance policies, etc).
Regardless, Powertop reports some strange things:

              Usage       Events/s    Category       Description
           75.4%                      Device         USB device: xHCI Host Controller
          100.0%                      Device         PCI Device: Intel Corporation Arrow Lake-HX Shared SRAM (SOC-S)
          100.0%                      Device         Radio device: ideapad_acpi
          100.0%                      Device         PCI Device: Kingston Technology Company, Inc. NV1 NVMe SSD [SM2263XT] (DRAM-less)
          100.0%                      Device         PCI Device: Intel Corporation Device ad03
          100.0%                      Device         Radio device: btusb
          100.0%                      Device         PCI Device: Intel Corporation 800 Series PCH SPI (flash) Controller
          100.0%                      Device         PCI Device: Intel Corporation Meteor Lake-H PCIe Root Port #12
          100.0%                      Device         PCI Device: Samsung Electronics Co Ltd NVMe SSD Controller PM9C1a (DRAM-less)
          100.0%                      Device         PCI Device: Intel Corporation Device 7f3f
          100.0%                      Device         PCI Device: Intel Corporation 800 Series PCH PCIe Root Port #13
          100.0%                      Device         PCI Device: Intel Corporation Arrow Lake-HX Crash Log & Telemetry
           19.6%                      Device         PCI Device: Intel Corporation Device 7f4d
           19.3%                      Device         runtime-i2c_designware.1
            0.0%                      Device         runtime-PNP0C09:00
            7.7 pkts/s                Device         Network interface: wlan0 (rtw89_8922ae)
           75.4%                      Device         USB device: ITE Device(8258) (ITE Tech. Inc.)
           50.0%                      Device         PCI Device: Intel Corporation 800 Series PCH PCIe Root Port #7
            0.0 pkts/s                Device         Network interface: enp129s0 (r8169)
            0.0%                      Device         USB device: xHCI Host Controller
            0.0%                      Device         runtime-PNP0C0C:00
            0.0%                      Device         runtime-PNP0C14:04
            0.0%                      Device         runtime-PNP0C14:03
            0.0%                      Device         PCI Device: Intel Corporation Arrow Lake-HX PCIe Root Port #13
            0.0%                      Device         PCI Device: Intel Corporation Meteor Lake-P Thunderbolt 4 USB Controller
            0.0%                      Device         Audio codec hwC1D2: Intel
            0.0%                      Device         Audio codec hwC0D0: Nvidia
            0.0%                      Device         Audio codec hwC1D0: Realtek
            0.0%                      Device         USB device: xHCI Host Controller
           75.5%                      Device         PCI Device: Intel Corporation 800 Series PCH USB 3.1 xHCI HC

Why "PCI Device: Intel Corporation Arrow Lake-HX Crash Log & Telemetry" is at 100% usage? Same with "PCI Device: Intel Corporation 800 Series PCH SPI (flash) Controller", and so on.
I'm not an expert, but it doesn't seem right.
I hope someone can help me, thanks :)