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Reason: Needs a function keys table (Discuss in Talk:Lenovo ThinkPad T550)

Hardware | PCI/USB ID | Working?
--- | --- | ---
Bluetooth (Intel) | `8087:0a2a` | Yes
Bluetooth (Realtek) | `0bda:8761` | Untested
Webcam | `04f2:b449` | Yes
Ethernet | `8086:15a3` | Yes
`8086:15a2` | Yes
WiFi (Intel) | `8086:095b` | Yes
WiFi (Realtek) | `10ec:818b` | Yes
WWAN (Ericsson) | `0bdb:193e` | Unknown
WWAN (Sierra) | `1199:a001` | Untested
GPU (Intel) | `8086:1616` | Yes
GPU (NVIDIA) | `10de:1347` | Untested
Touchpad |  | Yes
Touchscreen | Unknown | Untested
Trackpoint |  | Yes
Keyboard |  | Yes
TPM |  | Untested
Fingerprint reader | `138a:0017` | Yes
Smart card reader | `058f:9540` | Untested
SD card reader | `10ec:5227` | Yes
Audio | `8086:9ca0` | Yes

The larger 15-inch variant of the Lenovo ThinkPad T450.

## Backlight

See Backlight#Kernel command-line options to have the ACPI and backlight function properly. `acpi_osi=Linux` is another kernel parameter required for this.

## Wireless

See Lenovo ThinkPad T440s#Wireless; the T550 and the T440s share the same Realtek-variant WiFi card.

## Video

The T550 is only able to drive three displays at once. If you are using a one-to-three DisplayPort adapter, you will need to disable the laptop display (`xrandr --output eDP1 --off`) in order to use three external displays. Expect a heavy delay (1-2 seconds) while adjusting displays via DisplayPort with `xrandr`.

## SD card reader

See Lenovo ThinkPad T440s#SD card reader; the T550 and T440s share the same SD card reader (but with different sub-device IDs). See also https://linux-hardware.org/?id=pci:10ec-5227-17aa-2223.

## USB

Enabling Always On USB in the UEFI BIOS makes the forward-most USB port on the right side of the laptop (i.e., the charging port) unusable in Linux. Disabling this feature in re-enables the port.

## Function keys

By default, the function keys behave as multimedia keys instead of actual function keys. This behaviour can be changed in the UEFI BIOS settings so that `F1` to `F12` are used as standard function keys and special multimedia features are only triggered with the use of the `Fn` key.

## See also

- ThinkWiki page
- Product Specifications Reference (PSREF)
- Hardware maintenance manual
- User guide

Category:

- Lenovo

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