Be sure to update Lenovo Thinkpad X1 Tablet BIOS
Targus recommends to update the PC's various drivers and BIOS as recommended by the manufacturer to insure the functionality of the host PC with Targus Universal Docking Stations and solutions. For instance, the Lenovo X1 Tablet BIOS v. 1.63 dated 2/17/2017 must be updated. Targus has received reports that the Lenovo X1 Tablet host no longer working with the Targus ACA41 for USB Type-C Power Delivery with this version of the BIOS. Sometimes recovery is possible by hard reset of the X1 Tablet (via pin hole button on back and under kick-stand of X1). Note, BIOS version 1.55 dated 8/10/2016 through version 1.62 appeared to function. The issue is not specific to the Targus ACA41 or ACA44. See https://forums.lenovo.com/t5/ThinkPad-Tablets/Thinkpad-10-March-2017-BIOS-update-freezes-tablet/td-p/3610692 . We have also experienced intermittent issues causing inconsistent USB functionality with the X1 Tablet. Targus is still recommending other USB Type-C hosts, including other Lenovo branded PC, be considered for use with Targus USB Type-C Power Delivery solutions including the Targus ACA44 and ACA41.