ThinkPad X200 UltraBase

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ThinkPad X200 UltraBase (43R8781)

This is a proprietary docking station for models with a CS08 standard docking port.



  • 4x USB 2.0 (Type-A) port
  • 1x Ethernet (RJ-45) port
  • 1x DisplayPort 1.2 out port
  • 1x VGA-out (DE-15) port1
  • 1x Headphone port (3.5mm, TRS)1
  • 1x Microphone port (3.5mm, TS)1
  • 1x Serial Ultrabay Slim2
  • 1x DC-in (barrel) socket
  • 2x Audio speaker (stereo)


  • 1x Proprietary key lock (secures the laptop to the dock)
  • 1x Kensington security lock slot
  • 1x Integrated secondary battery charger (flip-out)


  1. This port suffers from varying (extreme to minimal) electromagnetic interference, due to inadequate electromagnetic shielding on said port. Depending on the port itself, you may experience background noise (audio) or a fuzzy screen output (video).
  2. This Ultrabay slot does not support the use of an Ultrabay battery.

Part numbers

  • 42X4963 (44C0554)

DisplayPort support in Linux

When passing module parameter at boot time you need to precede it's name by module name followed by a dot so in this case you would need to add i915.modeset=1 to your boot command line.
To pass module parameter in initramfs simply add it to your modprobe configuration and update your initramfs with update-initramfs command.

Kernel support for DisplayPort in intel graphic chips using KMS (Kernel Mode Setting) was added by Keith Packard in version 2.6.31. On the userspace side driver version 2.7 or newer is required to use KMS. In order to activate it you need to pass modeset=1 parameter to i915 driver either at boot time or in your initramfs.

Models supporting this accessory