XPS 15 9500, dim display on wake up

I have the exact same problem here. Any ideas?

Exact same thing happening here. I found that if I close the lid, and then reopen it, it comes back as if it were in sleep mode. But not really what you expect after spending Apple money on a PC. 

I just noticed this too. When the laptop wakes up to an extremely dim screen, I had to hit the power button once, to put the laptop to sleep, and click it again to bring it out of sleep and the screen gets back to normal. What would be causing this issue? It’s very annoying.

Speaking from experience with a multitude of systems including Dell as well as from other manufacturer's, waking a system from "Sleep" is best accomplished by tapping the CTRL key a few times opposed to moving the mouse or swiping a touchpad.

For the sake of testing, the next time you try waking your system, tap the CTRL a few times to see if the issue still occurs.

I also have the exactly same problem. In my case dim display will only apper if my laptop goes to sleep while charging. So while charging and laptop goes to sleep mode, and when I try to wake up my laptop it will wake up with very dim display. When this happens I close the lid and open it and normal lock screen appears with normal brightness. My sepcs are also same as yours. I used this laptop nearly one month and suddenly this issue appears. I did factory reset but even after that still this porblem continues.

I am having the same problem with an out of the box XPS 9500.  I ran the windows updates and Dell Command updates.  Now when it try to wake it up from sleep, the screen is so dim I can hardly see what is on the screen.  I have to use a flash light to see what I am doing.  Rebooting resolves it but I was able to get the display to show after closing the lid, but that doesn't always seem to work.

Hey guys... i have an update. I got in touch with Dell Pro Support. After troubleshooting with Dell for almost 2 hours they found an in house article regarding a Hardware issue with the monitor on the first few versions of the Dell XPS 9500 that was causing this issue. They sent a technician to my place with a brand new monitor (new top half of the laptop) and replaced it for me. I have been using the laptop for the last few days and have had no issues. The screen replacement also fixed a tolerance issue i had when the screen was closed. When i carry the laptop closed like a notebook and hold it around the middle of the hinged edge, the screen would pop open a little.  This does not happen anymore. So i would suggest calling dell right away (while in warranty) and getting your screen replaced. Send me a message if you need more info.

Hey, really appreciate this update! I have been messaging back and forth with Dell for a few weeks now, and they offered a screen replacement but I was hoping that we could find an alternate solution. If there it is in fact a hardware defect, I suppose I have no other choice. I am also experiencing that additional issue you mentioned with the screen opening up slightly when carrying the laptop from the bottom, so I would assume that we received the same defect in our devices. Thanks again, I will show them this comment.

bHAWKd, I have the exact same issue on my brand new out of the box Dell XPS 15 9500, how did you get in touch with Dell's Warranty team?

you can get in touch with them using support assist on your laptop. Or just call or chat with them using their support website

This solution worked on my xps 15.

I didn't have the Panel Self-Refresh in Intel Graphics Command Center (I believe it's supposed to be under System > Power), but the second part of that seemed to work for me:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001

FeatureTestControl set to 8a1 using Hexadecimal.  Note that I found mine under 0001 and not 0000