NUC10i7FNK USB-C to HDMI screen flickering/losing sync

[CPieh]

I have been trying to troubleshoot this persistent issue for quite some time. I have an Asus MX279 (non-4k) monitor and when I use the Thunderbolt 3 port aka USB-C DisplayPort Alternate the monitor flickers/randomly losing sync very often. I don't even have to be playing videos or anything. When I use the native HDMI port there are no issues at all. Things I have tried:

• Updated graphic drivers to the latest DCH (26.20.100.7529)
• Updated all Intel Drivers in which the ME assistant indicates no further updates available
• Updated BIOS to most recent (0037)
• USB-C to HDMI cable
  • https://www.amazon.com/gp/product/B075V5JK36/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
• USB-C to 2X HDMI Hub
  • https://www.amazon.com/gp/product/B07QKVY23Q/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
• USB-C to 1X HDMI Dongle
  • https://www.amazon.com/gp/product/B01K9S0VYM/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
• Several HDMI cables
  • Even tried a HDMI cable rated at 18Gpbs
• Changing the refresh rate from 59Hz and 60 Hz (and vice versa)

The monitor runs at 1920x1080p with no issues on the native HDMI port. Only when I use the DisplayPort Alternate are these issues present.

This is a brand new device released the end of last year. I bought this from CDW so it's not like it was obtained from a shady vendor.

[tstob1]

Interesting, we had the exact opposite. HDMI flickering, went to DisplayPort and has been working well. Sorry I can't be more help.

we did use the very latest Intel drivers as opposed to what was listed for the NUC.

[CPieh]

Furthermore I can confirm there is nothing wrong with any of the dongles or cables that I bought from Amazon. I am able to connect my Samsung S10+ phone using all accessories to my monitor with no screen flickering/losing sync at all.

Intel, do I have a bad Thunderbolt 3/DisplayPort Alternate USB-C connector? Is an RMA warranted? What further troubleshooting can I do?

[tstob1]

BIOS 38 posted: Fixed issue with BIOS fault tolerance failing after BIOS is resigned.

we will probably install. doesn't make much sense to me.

I am pretty sure we used these drivers:

https://downloadcenter.intel.com/download/29335/Intel-Graphics-Windows-10-DCH-Drivers?product=126789

 Curious what monitor you are using?

[CPieh]

I upgraded to BiOS 0038 tonight and it didn't make a difference.

I am using an Asus MX279 (non-4k). It is several years old before they came out with 4k as a standard on monitors but still has dual HDMI (1.3).

[tstob1]

Sorry, didn't see that in your original post. I am confused - you monitor does or doesn't have DisplayPort?

[CPieh]

My monitor has no DisplayPort. It has two HDMI and one VGA. Due to this I have to use either a USB-C to HDMI dongle or USB-C to HDMI cable. Neither method works and exhibits frequent flickering and/or intermittent sync loss.

If I use the dongle or the cable from my Samsung phone connected to the monitor there are zero issues. This would prove out the dongle and cable.

[tstob1]

Lucky my friend was using Dell 4k monitor with DP, that worked for us, HDMI would not.

I use a pair Dell U2518D 2k monitors, nothing high-end, decent monitors.

[OCarr6]

Hello friends, I have the same problem. Does anyone know how to fix it?

Thank you.

[tstob1]

Have you tried the very latest 26.20.100.7985 drivers on Intel's site?

most likely will have to uninstall your old ones to get these to go in.

are you using HDMI?

[OCarr6]

If I have tried with that version and it is not fixed.

I am using DisplayPort. From Thunderbolt to DisplayPort.

[AlHill]

Even better, use the latest latest, 8141:

https://downloadcenter.intel.com/download/29530/Intel-Graphics-Windows-10-DCH-Drivers?v=t

Doc

[OCarr6]

Hello

I have installed the new drivers and it still doesn't work.

[tstob1]

Please let us know if the very latest ones make a difference! nice find!