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NVIDIA OC failed. X server is not running. Control display is undefined. 2 GPUs. When only 1, works fine

Trex, latest HiveOS and latest Nvidia drivers.
Mboard settings: gen2, disable CSM.
Works fine when there is only 1 GPU (3070 or 2060) but when I add the 2nd using the x1 riser, it cannot apply the Nvidia OC and will not mine. I also lose the local display.
Deleted worker, flashed new image to SSD, added OC, then problem.
I looked at nvidia-settings --help but could not figure out how to define control display.
I used the Hive shell but was not sure how to start X server
Any help would be appreciated.
Thanks

Did you find the solution. I am facing the same prob .

I kind of found a solution. I think the problem was caused by my motherboard. MSI B550-A Pro. (and an AMD 5600X CPU)
This motherboard has 2 x16 PCIe slots and 1 x1 PCIe slot.
I tried the card on another older PC (MSI Z97-GD65 with Intel i7-4790 CPU) using the same 1x riser and cables and it worked fine.
(This older MSI motherboard has 3 x16 PCIe slots and 4 PCIe x1 slots)
I then flashed the MSI B550 with the latest BIOS (even though the current BIOS was only 3 months old).
I tried another Nvidia card (1660-Super) on the newer MSI B550 and it worked fine on the 1x PCIe slot with the x1 riser.
I wanted to add a 3rd card (2060) so I bought a PCIe x16 extension cable and that seems to be working (just added last night).
(After the trouble I had using the x1 risers, I wanted to be sure that the 3rd card worked).
I am beginning to think that the choice of motherboard does matter. And that it one wants to run a multiple graphic card rig, it is better to go with motherboards which have been shown to work.

Hi All,

If any one is experiencing the same issue. I have found a solution for this go on this website below:

You can run this command “update-rc.d ‘/etc/init.d/xserver start’ defaults” (without quotes) into the command line on Hive OS.

Hope this solves your issue aswell.

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