# Lenovo ThinkPad S440

This article was written to assist you with getting archlinux run on the Lenovo ThinkPad S440. It is meant to be help you with some tricky points aside to the Beginners' guide: A guide through the whole process of installing and configuring Arch Linux; written for new or inexperienced users.

## Prerequisites

### Creating an installation medium

To create a bootable USB-Stick with the archlinux*.iso you downloaded, simply:

     dd bs=4M if=archlinux*.iso of=/dev/sdX && sync

which will/should behave like a regular bootable CD-Rom in addition to a capable BIOS and the correct bootsequence! In doubt or in case of problems see Install from a USB flash drive for more detailed instructions.

### Enable Legacy Boot

On boot press F12 to enter the BIOS menu and choose your USB-Stick to boot from. If you like, you can disable UEFI boot completely in the BIOS settings too.

## Installation

After that it is recommended to follow the usual installation procedure described in the Beginners' guide.

### LAN

Works out of the box with module `r8169`.

If you use Lenovo's Thinkpad OneLink Dock you need asix-ax88179-dkms for it's ThinkPad OneLink GigaLAN adapter. The module `ax88179_178a` delivered with the stock kernel doesn't work.

### WLAN

Works out of the box with module `iwlwifi`.

### Audio

Works out of the box with module `snd-hda-intel`.

### Video

The S440 comes with ati intel hybrid graphics. Currently the best implementation for `i915`/ `fglrx` hybrids is found in the unofficial catalyst repository.

     pacman -S catalyst-hook catalyst-utils-pxp xf86-video-intel intel-dri

You can switch between the two drivers with on of the following commands:

     # intel
     aticonfig --px-igpu

     # ati
     aticonfig --px-dgpu

If you encounter tearing in video playback when using Intel graphics (some S440 variants come without dedicated ATI chip), try enabling the Intel drivers' "TearFree" option.

### Touchpad

A synaptics touchpad with two-finger scrolling. Install xf86-input-synaptics to get it running with multi-touch gestures.

### Frequency scaling

Work well with cpupower as described in CPU Frequency Scaling. Be aware, that the `ondemand` governer doesn't work with i7 4500M atm. I choose `powersave` as default.

### Webcam

Works out of the box with `uvcvideo`.

### Keyboard backlight

Currently the `thinkpad_acpi` module does not support to turn the keyboard backlight on. But you can turn it off with:

     echo 0 > /sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness

### Fingerprint scanner

To get that working you need fprintd and libfprint-vfs5011-git. Follow the Fprint guide for the rest.

### Suspend

Works flawlessly with with pm-utils or any DE integration.

### Power consumption

With cpupower, laptop-mode-tools and acpid installed and graphics switched to intel gpu, I get over 9 hours battery life.

#### Automatic brightness control

If you want to change the brightness on ac-adaper plug-on/off, add the following in /etc/acpi/handler.sh:

     ac_adapter)
         case "$2" in
             AC|ACAD|ADP0|ACPI0003:00)
                 case "$4" in
                     00000000)
                         logger 'AC unpluged'
                         echo "20" > /sys/class/backlight/acpi_video0/brightness
                         ;;
                     00000001)
                         logger 'AC pluged'
                         echo "50" > /sys/class/backlight/acpi_video0/brightness
                         ;;
                 esac
                 ;;

Category:

- Lenovo