Home / ubuntu / Questions / 1142692
In Process
Jimmy Falcon
Asked: 2019-05-13 10:53:52 +0800 CST

Cannot boot Ubuntu 16.04 on a mining rig with 6 GPUs, AMD 970 motherboard

  • 772

I can run 6+ GPUs mining rigs successfully on any Intel motherboard under Ubuntu 16.04, however with AMD 970 motherboards, only 5 GPUs work. If I install the 6th GPU, the system boots, then I can see the GRUB menu, but very shortly after that I end up with a blinking cursor. Obviously, I am not even getting to booting the kernel.

How can I troubleshoot this, at least to find out the cause?

thank you.

boot kernel 16.04

1 Answers

  1. Problem solved by adding iommu=soft to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub file. Also need to run sudo update-grub afterwards.

    jj@RIG12:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
02:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
06:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
07:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
08:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
0d:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1060 3GB] (rev a1)
    • 0