Lenovo ThinkPad X220

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Hardware	PCI/USB ID	Working?
Touchpad		Yes
TrackPoint		Yes
Keyboard		Yes
Video	`8086:0126`	Yes
Webcam	`04f2:b217`	Yes
Ethernet	`8086:1502`	Yes
Bluetooth		Untested
SD-card reader	`1180:e823`	Yes
Audio	`8086:1c20`	Yes
Wireless	`8086:0085`	Yes
Fingerprint Reader	`147e:2016`	Yes

Installation

The X220 can not boot from a GPT disk in Legacy BIOS mode, it is necessary to either switch to UEFI booting or create a MBR Partition Table.

Firmware

fwupd does not support this device yet.

To update the firmware on the device, get the latest bootable CD and follow the steps in Flashing BIOS from Linux#Bootable optical disk emulation.

Power management

After waking up the device from suspend, the device might get stuck in a reboot loop. This can be caused by the EFI storage getting too full. Run the following commands as root to free up some space.

 # First clear the pstore
 mkdir -p /dev/pstore
 mount -t pstore pstore /dev/pstore
 ls /dev/pstore # <- Nothing important should be here, but check first anyway
 rm /dev/pstore/*

 # Next some EFI variables. These are used/created by pstore, but I have had them even though 
 #I deleted the pstore data using the above commands. YMMV.
 rm /sys/firmware/efi/efivars/dump-type0-*

Microphone

The internal microphone can generate a lot of static or hissing, the workaround is to mute the right mic input channel.

Touchpad

If the touchpad is jumpy/imprecise, copy the two lines below into a new file:

/etc/udev/hwdb.d/90-libinput-x220-touchpad-fw81.hwdb

touchpad:i8042:*
 LIBINPUT_MODEL_LENOVO_X220_TOUCHPAD_FW81=1

then run udevadm hwdb --update && udevadm control --reload-rules && udevadm trigger

See Fedora bug #1264453 for more details.

Function keys

Key	Visible?¹	Marked?²	Effect
`ThinkVantage`	Yes	Yes	`KEY_PROG1`
`Audio mute`	Yes	Yes	`KEY_MUTE`
`Mic mute`	Yes	Yes	`KEY_F20`
`Volume down`	Yes	Yes	`KEY_VOLUMEDOWN`
`Volume up`	Yes	Yes	`KEY_VOLUMEUP`
`Fn+F1`	Yes	No	`KEY_FN_F1`
`Fn+F2`	Yes	Yes	`KEY_COFFEE`
`Fn+F3`	Yes	Yes	`KEY_BATTERY`
`Fn+F4`	Yes	Yes	`KEY_SLEEP`
`Fn+F5`	Yes	Yes	`KEY_WLAN`
`Fn+F6`	Yes	Yes	`KEY_CAMERA`
`Fn+F7`	Yes	Yes	`KEY_SWITCHVIDEOMODE`
`Fn+F8`	Yes	Yes	`KEY_F21`
`Fn+F12`	Yes	Yes	`KEY_SUSPEND`
`Fn+Home`	Yes	Yes	`KEY_BRIGHTNESSUP`
`Fn+End`	Yes	Yes	`KEY_BRIGHTNESSDOWN`
`Fn+Space`	Yes	Yes	`KEY_FULL_SCREEN`
`Fn+Left`	Yes	Yes	`KEY_PREVIOUSSONG`
`Fn+Right`	Yes	Yes	`KEY_NEXTSONG`
`Fn+Up`	Yes	Yes	`KEY_STOPCD`
`Fn+Left`	Yes	Yes	`KEY_PLAYPAUSE`

The key is visible to xev and similar tools
The physical key has a symbol on it, which describes its function