Lenovo ThinkPad T540p

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Hardware

root #lscpu
root #lspci -nnk
root #lsusb
Bus 002 Device 002: ID 8087:8000 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 003 Device 005: ID 04f2:b39a Chicony Electronics Co., Ltd 
Bus 003 Device 006: ID 046d:c048 Logitech, Inc. G9 Laser Mouse
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Installation

Note
Since the Minimal Installation CD[1] does not come with the necessary firmware to use the wireless networking controller you will be forced to use another live system, if you are planning to establish a wireless lan connection during installation.

Firmware

The Wi-Fi module requires external firmware (hardware specific package sys-firmware/iwl7260-ucode or the general package sys-kernel/linux-firmware):

root #emerge --ask sys-firmware/iwl7260-ucode

or

root #emerge --ask sys-kernel/linux-firmware

Kernel

KERNEL Wi-Fi
Device Drivers  --->
    Generic Driver Options  --->
        -*- Userspace firmware loading support
        [*] Include in-kernel firmware blobs in kernel binary
        (iwlwifi-7260-12.ucode) External firmware blobs in kernel binary
        (/lib/firmware) Firmware blobs root directory
KERNEL TPM
Device Drivers  --->
    Character Devices  --->
        [*] TPM Hardware Support --->
            [*] TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface

Troubleshooting

Suspend/Resume does not work

A common problem can be encountered if the TPM chip has been activated in UEFI/BIOS. If the kernel lacks the necessary drivers the system freezes when attempting to resume from a suspend. As a solution, enable TPM in the kernel.

External resources

References