ThinkPad X220: Arch Linux Notes

UNDER CONSTRUCTION: The document is currently being modified!

Customization

Keeping the Boot Log on TTY1

In order to stop Arch Linux from clearing the screen on boot we can add the i915 module to MODULES inside of /etc/mkinitcpio.conf and then regenerate our kernel images.

# sudo sed -i -r 's/^MODULES="([a-z0-9 _-]+)"/MODULES="\1 i915"/' /etc/mkinitcpio.conf # sudo mkinitcpio -p linux

Then create a directory for getty overrides and create one with the following.

# sudo mkdir /etc/systemd/system/getty@tty1.service.d # sudo vim /etc/systemd/system/getty@tty1.service.d/noclear.conf

[Service] TTYVTDisallocate=no

Traditional Network Interface Names

To translate the predictable network interface names back into traditional ones, can create the following. You can use the vim command :r !cat /sys/class/net/wlp3s0/address, replacing the device node respectively, in order to get the MAC Address of each device.

# vim /etc/udev/rules.d/10-network.rules

SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="MAC_ADDRESS_FOR_NIC", NAME=="eth0" SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="MAC_ADDRESS_FOR_WIFI", NAME=="wlan0"

Hardware

Battery

Install TLP and related packages.

# yaourt -S tlp tp_smapi acpi_call # sudo tlp start

TLP status can be shown with the following:

# sudo tlp-stat

Fan Control

Install thinkfan, default configuration is installed into /usr/lib/modprobe.d/thinkpad_acpi.conf.

# yaourt -S acpi lm_sensors thinkfan

Then detect the hardware monitors chips that are available. Then re-enable the thinkpad_acpi kernel module to update with the new config.

# sudo sensors-detect # sudo modprobe thinkpad_acpi

To show the current thermal and cooling information use acpi.

# sudo acpi -V

To show the current fan speed and level.

# sudo cat /proc/acpi/ibm/fan

Make the changes to point it to the right temperature reading, you can use :r !sudo find /sys/devices -type f -name "temp*_input" in order to paste all the monitors into the file.

# sudo vim /etc/thinkfan.conf

When finished it should look something like this:

hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp1_input hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp2_input hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp3_input hwmon /sys/devices/virtual/hwmon/hwmon1/temp1_input tp_fan /proc/acpi/ibm/fan (0, 0, 35) (1, 33, 38) (2, 36, 45) (3, 39, 49) (4, 46, 58) (5, 50, 62) (7, 56, 32767)

You can verify the config is written correctly with the following command.

# sudo thinkfan -n

Finally enable and start thinkfan.

# sudo systemctl enable thinkfan # sudo systemctl start thinkfan