NUC8i7HVK + Dell U3818DW

[MLevi]

The Dell curved U3818DW is a multi-input 38"

(http://www.dell.com/ed/business/p/dell-u3818dw-monitor/pd UltraSharp 38 Curved Monitor: U3818DW | Dell )

Ports and Slots:

1. AC power connector | 2 and 3. HDMI connectors | 4. DP connector (in) | 5. USB Type-C port | 6. Audio line-out port | 7 and 8. USB upstream ports | 9. USB downstream port | 10. USB downstream port with power charging

I have the NUC8i7HVK connected via the TB3 out to the monitor USB Type-C port (# 5) and my work computer connected via the Display Port (# 4).

The very cool feature of this monitor is the built-in KVM switch if you want full-screen either computer or side-by-side both via the PIP/PBP setting.

NUC Power settings:

Never sleep

Never hybernate

BIOS 0048

Intel: 24.20.100.6229

https://downloadcenter.intel.com/download/27894/Intel-Graphics-Driver-for-Windows-10?product=98909 Download Intel® Graphics Driver for Windows® 10

Radeon: 18.6.1

https://downloadcenter.intel.com/download/27881/Graphics-Radeon-RX-Vega-M-Graphics Download Radeon™ RX Vega M Graphics

Problem Statement

When I switch to the work computer and work for any length of time and switch the monitor back to the NUC, sometimes the monitor will not wake. Note: sleep, hibernate all switched off

I think the monitor stops sending signal to the NUC when I'm switched to the work laptop. Perphaps its more likely that the NUC can't detect the monitor signal on the TB3 when it is switched over to the work laptop.

When that happens I have to unplug/re-plug on the back of the NUC, and re-seat. Wakes up every time.

It's only annoying when it happens, but what I'm not sure is if the Dell U3818DW is the reason (also has latest firmware) or the NUC. Would appreciate your input.

SSU log attached. I haven't noticed it (yet) on BIOS 0048. It "seems" to have happened more in BIOS 0046, less in BIOS 0047.

[idata]

Hello MikeLevine,

Thanks for submitting this question on our Intel Communities. How long ago did you install BIOS version 0048? There is a chance the BIOS update fixed the problem. Please test the system for a few days and let us know if issue comes back. Please update this thread at your convenience. Regards,Fred D.

[MLevi]

Two days after it was released.

[MLevi]

HI Fred,

It just happened again this morning with BIOS 0048.

1. Switched U3818DW to my work laptop at 4:40 am this morning

2. At 8:13, I switched back to the NUC and it happened again. I waited until 8:20, using my mouse and keyboard, no change.

3. This time: I switched back and forth between the two computers, with no result for the NUC8i7HVK.

4. At 8:21, I removed the TB3 cable from the back of the NUC, and re-seated.

5. Video signal great.

I'm leaning on the side of it's the NUC, but not discounting the monitor KVM.

[idata]

Hello MikeLevine,

Have you tried different video port on the Intel® NUC Kit NUC8i7HVK like HDMI or the other USB Type-C port? Besides the monitor firmware update you installed you may also try installing the monitor driver from this link https://www.dell.com/support/home/ed/en/edbsdt1/drivers/driversdetails?driverId=RMYJT https://www.dell.com/support/home/ed/en/edbsdt1/drivers/driversdetails?driverId=RMYJT Please also install this USB Type C Power Delivery Controller driver https://downloadcenter.intel.com/download/27721/NUCs-USB-Type-C-Power-Delivery-Controller-for-Intel-... https://downloadcenter.intel.com/download/27721/NUCs-USB-Type-C-Power-Delivery-Controller-for-Intel-... In your first post, when you said "I have to unplug/re-plug on the back of the NUC, and re-seat.", what do you mean by "re-seat"? Do you mean just reconnect the cable or do you do something else? Regards,Fred D.

[MLevi]

Hi Fred,

Thanks for the links.

"re-seat" = reconnect

I have the latest driver for the monitor installed

Testing completed to date:

• Replaced TB3 cable with : https://www.amazon.com/gp/product/B074JZVD2M/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 Amazon.com: [Thunderbolt 3 Certified] Nekteck Active Thunderbolt 3 (40Gbps) Cables 100W (ONLY Thunderbolt 3 Port Compati…
• Over the past months used both USB-C ports
• Confirmed Thunderbolt Bus Driver is current
• Checked connection of TB3 cable on both ends of the USB-C chain

Results: No difference. It occurs on both USB-C ports - but the issue occurs inconsistently and I don't notice any pattern. Both the NUC and work laptop are connected to the monitor 24/7

Next steps

• Install the USB Type C Power Delivery Controller driver
• Reboot

Do you have a testing process you want me to try?

[MLevi]

Update: I've included testing a Universal Audio (Arrow) - USB-C (TB3 bus powered) Audio Interface on the other USB-C port.

I stopped using it in build 0044 because of regular bus-power resets.

So far, no USB-C issues with either the monitor or Audio Interface.

https://www.uaudio.com/audio-interfaces/arrow.html?gclid=EAIaIQobChMI5aCk5uL33AIVS4ezCh0rzwdOEAAYASA... Arrow | Desktop Thunderbolt 3 Audio Interface | Universal Audio

I'm watching them both the Arrow and monitor closely.

Mike

[idata]

Hello MikeLevine,

Thanks for the additional information. Please test the Universal Audio (Arrow) - USB-C (TB3 bus powered) Audio Interface a little bit more, and let me know if issue persists or not. Regards,Fred D.

[MLevi]

Hi Fred, et al.

Between the first post and the one just before this, I upgraded to 0049.

Testing Steps 1

Connections

NUC8i7HVK (Home PC)

The UA Audio Interface USB-C Back - Port A

The DELL U3818DW - USB-C Back - Port B

DELL Inspiron (Work PC)

The DELL U3818DW - Display Port

Using the monitor's KVM, switching back and forth and PBP between Home and Work PC every 2 hours or more. No issues.

Testing Steps 2

Reversed the USB-C connections between monitor and the Audio Interface : no issues testing

Also of note: the USB-C bus is not resetting. Meaning, when I used to switch from work PC to home PC, the USB-C ports would reset the UA bus powered device, and other USB ports would reset.

That problem is no longer presenting. BIOS settings are default.

Consider it closed. Thanks!