Cannot get into Bios on Max XI Form when connected via Disp Port to PG27UQ

[kshafe777]

Ok, as the title says, I cannot get into bios ( any way at all ) on my Maximus XI Formula connected to My PG27UQ via Display Port Cable.

here are the details:

first - the configuration that I tore it down to in order to eliminate possible issues -
Asus Maximus XI Formula
9900k
took the 64 GB Trident Z 3600 speed ram down to two sticks to make sure wasn't ram issue
Samsung 970 EVO m.2 connected to M.2_1 slot
Asus Strix 1080TI - OC edition
Corsair AX1200i PSU


This is my *Second* Max XI Formula mb.. first one was RMA'd due to this and a CMOS Error that kept coming up.
if I have the PG27UQ connected via Display port cable ( initially using the one that comes with the monitor from Asus ) there is no way into bios. I have tried;
1) hitting del key continuously ( never see the post screen, just goes straight to win desktop )
2) hitting F2 key continuously
3) doing a shift+restart to open windows troubleshooting mode and trying to go to UEFI
4) changed post time to 10 seconds ( I did this later when I figured out what the problem was... )
5) taking out boot drive ( just goes to HDD error and doesn't advance.. no option to get to bios )
6) unplugging cpu fans to try and force a cpu fan error and prompt for F1 to enter setup
7) held down Clear CMOS button
😎 removed CMOS battery
9) yes.. all devices were disconnected from MB other than mouse / keyboard
10) did bios update from 0602 to 0805 using BIOS Flashback on back of board
11) did fresh install of Windows 10 ( obviously, but need to state that ) with nothing loaded.
12) moved m.2 drive from slot 1 to slot 2
13) removed m.2 drive and connected ssd drive via sata port 2 with Fresh win 10 installed ( version 1809 )
14) swapped 1080ti to 2080ti and got same results
15) swapped the Display port cable that came with PG27UQ to a Certified Display Port Cable.
16) switched to HDMI 2.0 Cable and everything works.. except high refresh rate is now not possible because HDMI caps at 60 hz



when I got beyond this I remember that I had done my hardware testing before installing into case by connecting to a 1080p monitor I have using HDMI 2.0 Cable... so.. I switched to and HDMI cable, and vioalla.. I can get to bios. I have checked every possible bios setting to see if there is something that is set strange that could cause an issue accessing BiOs with DP hooked up.. but I can't find anything.

my conclusion is that there is some sort strange compatibility issue between the Maximus XI Formula MB and the PG27UQ when connected via DP. I don't have another monitor that uses DP to test that it's not just a DP connectivity issue.. but at this point, I wouldn't be surprised.

Any help from ASUS would be appreciated as the current solution is that if I want to use the monitor to game and be in widows, I can be connected via DP, when I want to get to bios, I have to swtich to HDMI. this is $2,000 monitor paired with a $$450 ( overpriced ) motherboard.... and they don't work properly.

I also have a Maximus XI Extreme, and that works when paired with PG27UQ...

[XYchromosone]

technomation wrote:
NVIDIA is not showing that this firmware update supports GE Force Series 20 Turing graphics cards, only Series 10 and older (see Supported Products tab):

https://www.nvidia.com/object/nv-uefi-update-x86.html

and yet this page does:
https://www.nvidia.com/Download/driverResults.aspx/142736/en-us

note that the link I posted was in relation to updating the GPUs ready for DP 1.3, 1.4 nothing to do with game ready

[XYchromosone]

technomation wrote:
That's interesting that it could actually be NVIDIA's problem. I swapped my Display Port cable for HDMI and, like kshafe777, was then able to get into the BIOS. The NVIDIA fix is almost 8 months old; strange that Asus L2 support doesn't know about it. Has anyone else tried it to make sure it works and that it doesn't cause other problems?

I updated the firmware of 2 Asus nVidia GTX 1080ti /GTX 1060 when I was having random display and boot problems using DP. The problems have since been fixed.

I was actually surprised to find that the utility found that the ASUS Strix Gaming GTX 1080 Ti 11GB firmware was out of date and needed to be updated, since the card was reasonably recent.

Even the RTX 2080 need a DP firmware update.

As an end not , not that it might have anything to do with this particular problem there are DP cables wired incorrectly something about pin 21 or 22 feeding 3.3 volts that causes problems. This firmware update is supposed to fix that issue too.

[NVIDIA_Manuel]

Hello,
My name is Manuel and I am part of the NVIDIA Customer Care team. I need more information to look into this. Can you fill out the driver feedback form below and make sure to include the video BIOS version of your card? Also do you have this problem if you disable Windows 10 Fast startup?

http://surveys.nvidia.com/index.jsp?pi=6e7ea6bb4a02641fa8f07694a40f8ac6

Regards,
Manuel
www.twitter.com/manuelguzman