XPS 7590 HDMI not working after sleep

Have you tried updating the necessary drivers?

Have you tried setting up the HDMI monitor from the Control Panel > Hardware and sound > Devices and Printer?

If that doesn't work try this:

Try installing the latest BIOS and DisplayPort MST hub firmware update for your system; the latter pertains to a built-in device, not an external peripheral as is usually the case when discussing MST hubs.  Both updates are available on support.dell.com.

It's not showing up in device manager or in devices and printers.

BIOS is the latest version. DisplayPort MST hub is not a device I can find in the device manager and no firmware update sounding like that one shows up on the dell support driver site for my system. (https://www.dell.com/support/home/se/sv/sebsdt1/product-support/product/xps-15-7590-laptop/drivers)

Wouldn't the Dell Update software have found any updated drivers for my system?

Is the best system debugging really just to try to upgrade drivers? Aren't there error/diagnostic logs and the like that you can look at?

I have the exact same problem. 
HDMI port suddenly stopped working. Interestingly, I could use the external monitor using a USB-C->HDMI converter. 
Restart did not fix the problem but turning the laptop off and on brought the HDMI back to life (Thanks to @norpan's comment). 

Any comment from Dell support?

I got a bit tired of pulling and plugging all the cables each time I take my laptop from my desk, so I got a WD19TB (so now I only have to pull and plug one cable), plugging in my monitors to the dock's Thunderbolt and HDMI ports and I haven't had the problem since.

So maybe it's just a problem with the laptop's built-in HDMI port.

Getting a $300 dock just to solve this problem is an expensive solution though

I'm experiencing the exact same issue, intermittently. I have a Dell u2718q monitor connected to a XPS 7590's HDMI port. Sometimes after sleep the connection to the monitor is lost. Unplugging the cable has no effect, and neither does a restart. The only fix is to shut down the machine and then power up again. This sometimes results in a secondary problem where upon restarting the machine it hangs on the sign-up screen and eventually returns a blue screen with stop code: DRIVER_POWER_STATE_FAILURE

The laptop has all the latest Bios and driver updates. This is very frustrating, and I'm just wondering if anyone has found a fix for this? Could this be a hardware issue?

Having exact same issue. Did you find a solution yet? 

Same issue with my XPS.  The HDMI port worked in the past, no issues, then suddenly I can not detect an external monitor to project to at all.  The HDMI port appears to be dead. Was there a recent Windows update that may have created this bug????

Exact the same problem here !!

• Microsoft Windows 10 Pro Version 10.0.19041 Build 19041
• BIOS-version/date Dell Inc. 1.5.0, 25/12/2019
• NIVIDIA GeForce GTX 1650 26.21.14.4145 (26/11/2019)

I've had the same problem, and it eventually went away every time. (I didn't realize that shutting down did the trick until I found this thread). It's bizarre that rebooting doesn't do anything. 

Same as everyone here - yes, I checked my drivers, yes, they're up to date. It'd be appreciated if someone from Dell could chime in and at least acknowledge the issue. 

So no solution yet?

I have the same problem. I can only connect with USB-C dongle to HDMI and mini DisplayPort to DisplayPort. HDMI to HDMI doesn't work.

same problem here, only shutdown, wait a minute, and start again solves the problem.

talking to a company (around 20people) where everyone has a dell xps 7590 they all have the same problem.

DELL its about the details (at least you advertise with it)
this is a detail which realy

Same issue. Happens intermittently. I have to shut down and re-boot. Otherwise, no external monitor.

This really sticks when I am in the middle of a project and need to shut all my files and programs, shut down, restart, and then open everything up again and figure out where I was beforehand. Huge disruption and waste of time.

Dell, please fix this.

Thanks

Hello,

same issue with my Inspiron 15 7590 laptop !

Please Dell correct that !

Really annoying

I have the same issue. Happened a couple of times yesterday. How often does this happen with others ?. I am still within my 14 days returns period. I might send it back if it happens again. I rather not spend £1500 on a laptop that has this kind of issues.

Same model and same issue here,

Any updates on this?