On all my machines (with different processor) I get the following error # lspci -v 00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02) Subsystem: Lenovo ThinkPad X1 Carbon 5th Gen Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=10 <?> Kernel driver in use: skl_uncore lspci: Unable to load libkmod resources: error -12 As a result, modules in use are not printed, only kernel driver names. I have installed pciutils-3.5.6 kmod-27-r2 ls -l /lib/modules drwxr-xr-x 3 root root 4096 Aug 30 2018 4.14.65-gentoo drwxr-xr-x 3 root root 4096 Aug 28 02:54 4.19.141-gentoo drwxr-xr-x 3 root root 4096 Mar 21 2020 4.19.97-gentoo Kernel in use gentoo-sources-4.19.141