Found another bug:
This is on the Core i7 (not sure if it affects others)
So when the computer is first booted all is well and running at full speed.
If at any point, you unplug the power cord to use the laptop on battery, obviously the processor scales back to conserve energy.
Here is the issue:
When the power cord is plugged back in to recharge or no longer be portable, the CPU doesn't go back to full power and speed. It locks in a x17 Max Multiplier basically making a 3.2GHz CPU run at approx 1.7GHz. when under load.
Dell Needs to release a BIOS update to resolve this issue ASAP. It is awful, especially if you go to run a game after just being on battery power. Just browsing the web and such you probably won't notice.
Download CPU-Z if you wish to verify this on your machine.
On a side note: I haven't had a flicker yet with the .7 BIOS update and new Windows 10 update.
Yes, I got mine delivered yesterday after waiting for a month and am facing the same flickering problem. ( Very disappointing )
FWIW, on my system (4K screen), disabling Hyper-V DID seem to fix the flicker (without the BIOS update, but with the latest Windows 10 update).
I'm pretty certain now the flickering has to do with power management. On battery my screen freaks out and flickers uncontrollably frequently and even sometimes shuts off the screen completely until I close the lid and reopen. When charging it rarely occurs.
I have tried all of the options. From starting it up unplugged to plugged in to plugging it in after startup and unplugging it after startup. I can say for sure that when you think you found the fix it is temporary and will fail. I thought it was my wifi. Started it with wifi disabled and thought i found the issue. I was wrong. It did it less but sure enough it still flickered. So many times i thought i figured it out and it was me just tricking myself into thinking everything was ok cause it worked better for a few minutes or did not freak out as much. This comouter is ***.
I'm having this same issue intel core i5/8gb ram/ 256gb ssd/ 84WHr battery/NVidia 960m/ 4k screen purchased at microsoftstore.com
I first started to notice that it only happened when I was watching youtube videos or any video playback. when I would try to scroll down while the vide was still playing it would lag then flicker sometimes multiple times. Windows would giving me a message that the intel drivers had recovered as well. it happened every single time I did this without fail.
after I noticed it was the drivers I went to the dell website and downloaded the drivers for the intel graphics and it seemed to have worked. I could now scroll down during videos and it was fine. however the flickering started again, not when watching videos but just randomly. I tried to find out what was causing it but I have no idea at this point, nothing is 100% re-creatable as before. I've ran games and no flickering so I think its something to do with the intel graphics.
I'm not sure if I would return the laptop or wait to see if somehow the problem gets fixed on its own. I'm really bummed out because I had to save my money for a long time to get this laptop.
I just purchased the Dell XPS 9550 4k core i7 6700u 1tb 16gb from Best Buy 1 day ago. I installed all my development software (visual studio enterprise, mssql server, sharepoint 2013), then i noticed the flickering as well. Now I am worried. Debating just wiping the drive and starting over.
The first thing I did when I received this system was upgrade to win10 pro and update all drivers. Any other ideas to fix this?
Or take it back?
Since you stated you upgraded to 10 pro try disabling hyper-v. However all my experiences with 4 different exchanges show me personally that dell is not concerned about its customers or quality control. I like to think long term. Not sure this computer if they fix the issues will last
The Visual Studio 2013 installer can enable hyper-v depending on what portions of the SDKs you are installing (this link describes it being used for the Windows Phone Emulator).
...just search for "windows features" and go into the "Turn Windows features on or off" and see if Hyper-v is checked. Uninstalling it may solve your problem, but would prevent your from emulators/VMs in it.
The problem with hyper-v is likely related to the Intel HD 530 graphics driver as a similar issue was reported against the MS Surface Book with Intel HD 520 graphics. Hopefully Intel releases an update soon.