Arch on a Lenovo ThinkPad x140e

Recently at work I had been virtualizing Arch Linux on a MacBook Pro using VirtualBox. While there were many perks (easy backups, no hardware issues), when I left that assignment (and had to give back the Mac), I couldn’t justify spending a grand on a Mac which would spend most of its time running Linux in a virtual machine, so I set out to find a cheap, modern, Linux compatible laptop. Ultimately, I landed on the Lenovo Thinkpad x140e which was certified by Canonical to run Ubuntu. Unfortunately, for Arch Linux, much of the hardware did not work out of the box. This post covers the modifications I performed to get all of the hardware working including:

This guide assumes that you’ve gone through all of the steps in the Arch installation guide. For what it’s worth, this guide is window manager agnostic (or even atheist if you’re just in terminal), though I’m using Awesome.

Graphics

The integrated Radeon HD 8330 card is supported by the proprietary driver, catalyst (not recommended) or the open source xf86-video-ati driver. If using the latter, also install the mesa-libgq for 3D acceleration and mesa-vdpau for accelerated video decoding.

Internet

The ethernet card is supported by a driver in the kernel, you’ll just need to install a dhcp client (e.g. dhcpcd) to handle getting your computer to talk to the router.

Wireless is a little tougher, the Broadcom chipset used is not yet supported by any of the open source drivers, and so you’ll need to follow the instructions for installing broadcom-wl drivers. Namely:

  1. install broadcom-wl from the AUR
  2. create a blacklist file named something like /etc/modprobe.d/wireless.conf with the following:
blacklist brcm80211
blacklist b43
blacklist ssb
  1. create a modules-load.d file named something like /etc/modules-load.d/wireless.conf with:
wl
  1. restart the machine.

You should then be able to connect to wireless through wifi-menu and netctl.

Trackpad and Trackpoint

I personally am not a fan of the track pad, but if you’d like yours to work install xf86-input-synaptics and configure it to your liking.

Trackpoint should work out of the box, though if you’d like middle button scrolling, add the file /etc/X11/xorg.conf.d/20-thinkpad.conf with:

Section "InputClass"
    Identifier  "Trackpoint Wheel Emulation"
    MatchProduct        "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device"
    MatchDevicePath     "/dev/input/event*"
    Option              "EmulateWheel"          "true"
    Option              "EmulateWheelButton"    "2"
    Option              "Emulate3Buttons"       "false"
    Option              "XAxisMapping"          "6 7"
    Option              "YAxisMapping"          "4 5"
EndSection

and restart.

Sound

While the integrated sound card is supported out of the box, the system will most likely set the wrong default card and so you won’t be able to hear anything, you can correct this by disabling the other sound device (which is actually just a virtual device exposed by thinkpad_acpi to represent the volume and mute buttons, and is not really needed — see below) by adding a file /etc/modprobe.d/alsa-base.conf with

options snd_hda_intel 1 enable=1 index=0
options snd_hda_intel 2 enable=0 index=1

and restarting. You’ll still need to unmute all the channels using something like alsamixer. Install alsa-utils through pacman and use alsamixer to unmute the channels and adjust the volume.

ACPI Events (volume and brightness keys)

In the past I’ve configured the window manager to handle volume and brightness function keys. However, using the Linux ACPI daemond allows your machine to handle these keys strokes before you even start X! First install acpid through pacman, and start and enable acpid using systemctl. Next, you’ll be making the events for the brightness and volume key presses.

/etc/acpi/events/bl_d

event=video/brightnessdown
action=/etc/acpi/handlers/bl -

/etc/acpi/events/bl_u

event=video/brightnessup
action=/etc/acpi/handlers/bl +

/etc/acpi/events/vol_u

event=button/volumedown
action=/etc/acpi/handlers/vol -

/etc/acpi/events/vol_d

event=button/volumeup
action=/etc/acpi/handlers/vol +

/etc/acpi/events/mute

event=button/mute
action=/usr/bin/amixer set Master toggle

Next make the directory /etc/acpi/handlers, in which create the following files:

/etc/acpi/events/bl

#!/bin/sh
bl_dev=/sys/class/backlight/radeon_bl0
step=5
case $1 in
  -) echo $(($(< $bl_dev/brightness) - $step)) >$bl_dev/brightness;;
  +) echo $(($(< $bl_dev/brightness) + $step)) >$bl_dev/brightness;;
esac

/etc/acpi/events/vol

#!/bin/sh
step=5
case $1 in
  -) amixer set Master $step-;;
  +) amixer set Master $step+;;
esac

… and make these files executable with sudo chmod 755 /etc/acpi/handlers/*.

Note that the vol handler require amixer which is part of the alsa-utils package.

Conclusion

That’s about it. There’s always more to be done, from customizing your wifi to auto-connect, to setting up external displays, to installing an configuring a window manager, but after following these steps, all of your hardware should be up and running properly.

*****
Written by Tome Dunlap on 26 December 2014