HP is now replacing all the Revision 1 cables with the new Rev2 cables to solve the power issues and you get an on/off power button too. You need to contact support to get yours, but may want to wait for a while if you have no problems at the moment to let others who need them get theirs first.
HP Official Announcement on Reddit - Replacing Revision 1 cables
HP Official Announcement on Reddit - Replacing Revision 1 cables
