TX2 log in freez

After I flash jetpack, I tried to log in. But, no input is working; indeed, on the log-in page of the Ubuntu, the cursor is not blinking. Strangely, when I click the user-defined button on the hardware, the cursor blinks, but I cannot still use the keyboard or mouse. Then, about a few seconds later, the blick stops. Can anyone tell me what’s going on with my new TX2?

here’s my video about it: https://www.youtube.com/watch?v=EpHTvSRzzFU

It’s hard to see from the video, but I think I’ve seen messages of missing xhci firmware and many lightdm messages…I’d advice to relaunch JetPack and reflash. If downloading packages is fast for you, I’d also advice to use a new folder and download last JetPack.