I bought the same item, from another seller though. It works for Duplicate. But it does not work for Extend. It cannot detect my Samsung SyncMaster T260HD. It even gives blue screen at times. Can yours do the Extend?
It works ok when I boot from HDD. Can Duplicate, Extend, etc. However, when I boot from mSata SSD, can Duplicate. Once I choose Extend, Blue Sreen! Hmm....conflict with mSata SSD?
Also, realised that x220 does not have Presentation Director that I used to have for my x61. Missed it a lot as it can do all sort of scheme setup, when stand alone, when connector to external, when dock, when remove from dock. Is there any other replacement for Presentation Director?