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 (126.96.36.19929)
- 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
- USB-C to 2X HDMI Hub
- USB-C to 1X HDMI Dongle
- 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.
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.
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?
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:
Curious what monitor you are using?
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).
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.