Topic: ASROCK H81 PRO BTC (R2.0) in Linux. PCIE slots do not detect GPUs (Read 6017 times)

Ok, unplugging the mouse and keyboard didn't do jack. 

I'm getting more and more convinced there's a major issue with this board.
I tried booting up smOS via the onboard VGA after reconnecting my 4 GPUs and I was greeted by the "please install the PSU's 4-pin power cables to the 4-pin connections on your motherboard" screen DESPITE using powered risers AND having those 2 molex connected to the PSU... 
I ignored and booted anyway and the whole thing restarted after 10 minutes or so after a fan gradually started doing a funny noise. 

Also smOS couldn't seem to connect to the internet. 

I'm bummed. Big time.

Are you using a modular PSU? 

If you are: maybe you have accidentally attached the molex power cable to a sata slot instead of the one labeled molex or perif on the PSU end?

If your problem is that your mobo doesn't recognize the gpus, maybe i have the solution.

Try to move your keyboard usb wire. I have a Alien keyboard with 2 usb, since I remove one of them, my mobo is recognizing all my gpus.

Have you tried resetting the mobo to factory defaults?

Ok, I'll look into it. 
I still have the "SM bus controller" for the location PCI bus 0, device 31, function 3 that gives me a code 28 (not installed), which sounds like it could have something to do with it...

I'll try and reinstall some constructor drivers while I look into smOS and amdOC.
I actually do know a bit about smOS as a coworker of mine with the same setup has been using it as of late.
Any advice regarding installation? Should I plug everything back in before reinstalling the OS?

Thank you!

Yes I would plug everything back in before booting with either OS.

try smOS: https://bitcointalksearch.org/topic/mining-os-simpleminingnet-manage-your-gpu-farm-the-easy-way-30-days-free-1541084 or my amdOC beta (the red link at): https://bitcointalksearch.org/topic/os-nvoc-easy-to-use-linux-nvidia-mining-1854250  either will probably work.

Glad it works. 


Have you set the pcie to gen 2?

If so; and you still have the problem, I recommend trying only 1x GPU in the 16x slot. 

Ensure you do a full power cycle as described earlier in this thread.  Does that single GPU work?

Yes that's what I assume. The onboard should lose display, that has always happened with my other rigs.  all the GPUs I try power on with lights and fans spinning...

Ok, I have already done all of that. This BIOS version only lets you choose one or the other (PCI or onboard). iGPU multimonitor is set to disabled by default.
The card is not detected by BIOS even when it is connected directly to the 16x slot. Display only works on onboard, even when having the card connected and PCI chosen as primary. It ignores it as if nothing is connected there. Both of the Motherboards I have do this exact same thing.

Once I am in Linux, I try to run lspci, and it does not show any VGA adapters connected except the onboard. It's really strange, but I think I was sent two faulty motherboards then.

I only know of the BIOS option under chipset configuration where you select the primary graphics adapter. I have chosen the PCI Adapter as primary. Is there another option to specifically disable onboard graphics in the BIOS other than this one?

I have bought other ASROCK motherboards and have rigs running successfully on them.
The first version of the H81 PRO BTC worked with the same graphics cards.
I bought two ASROCK H81 PRO BTC R2.0, and they're both presenting the same problem: PCIe slots do not recognize the GPU (regardless of the GPU or the PCIe slot used). The cards fail to be detected even if I try to install them directly onto the 16x slot without a riser.
I'm pretty sure the problem is not the GPUs because I have them running fine in other systems. The problem is present as early as startup, at BIOS, so before the OS (in this case Linux) is even loaded...which is why I think it's the motherboard. The system starts up with the integrated graphics only, as if there was no GPU connected. I have made sure the usual options in the BIOS were selected as I've done before with several machines: PCI Adapter as primary graphics, changing to Gen 2.0 etc. but unfortunately this did not solve the problem. The BIOS version is P1.2 which seems to be the only available one for this MB, I also tried flashing the BIOS with the same version regardless.. and nothing.

Have swapped all components CPU, RAM, GPUS etc.

Tried to contact ASROCK support, have not heard anything from them after 5 days.

I'm wondering if anybody is using this version of the H81 PRO BTC motherboard (R2.0) with Linux successfully and if they had to do anything in particular to make it work. I find it hard to believe that the two motherboards I bought just happen to be faulty.