Hi,
I just got the new Kaby Lake (Intel's 7th gen) Spectre x360 and ran it through its paces. It seems to be a solid machine, but there's one serious issue so far - external displays flashing on and off, at least when hooked up with a USB-C Thunderbolt 3 to DisplayPort adapter (this one from CableMatters: http://amzn.to/2gKQrVR.
- What happens when I connect external monitors (1 or 2-3 via DisplayPort MST) is sometimes they work fine.
- Sometimes, if I disconnect and reconnect, they start flashing on and off.
- Sometimes, the whole laptop freezes upon connection (happened twice today so far).
- And finally sometimes the externals are not working at all - the system detects them, but selecting Extend or anything in multi-monitor mode just reverts back to Single.
- Oh, and this happens once: http://i.imgur.com/Su9zInD.png http://i.imgur.com/qG9K8yC.png - the external display got stuck in a 640x480 generic mode and would not turn on.
As you can see, it's a cluster@$%*.
Here's a video of the flickering/flashing (case #2 above): https://youtu.be/OkngFs_h2xk.
Both the laptop and the 7th gen Intel chip are relatively new, so I haven't been able to find a thread discussing potential culprits, or fixes from HP. Here's a similar issue with EliteBooks http://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/External-Dual-Monitors-and-Laptop-screen-issue-EliteBook-840/td-p/5516803, but I don't know if they're related.
I do have a buddy with the same system who's gone through several USB-C hubs already and returned each one due to flashing, so I think the problem lies deeper, probably with Intel's HD Graphics.
I don't want to give up on this laptop and go back to my Dell Latitude E6520 (which is a 6lb clunker, or like 10lb with the battery slice), so I hope HP can look into it. Reliable use with external monitors is a must these days for any home or business user (I happen to be both).
There's an ongoing discussion on Google+ here about this: https://plus.google.com/u/0/+ArtemRussakovskii/posts/4sF6o9tbR9s.
Thanks for any help.
P.S. I'm a technical user and a software engineer, so I'm not afraid of challenges getting this fixed. HP level 2+ support, I'm here to help you figure out the solution.