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Multiple GPUs in Linux - How to specify which GPU runs X windows

Fresh5 days ago
Mar 15, 20267030 views
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Problem

I have been running Red Hat Enterprise Linux 6.1 on a system with a GTX 480. Recently I added a 3GB GTX 580, as my CUDA application requires more memory than I have on the 480. Due to space issues in the box, I had to place the 580 on the PCI-E bus closest to the CPU, and move the 480 to the second…

Error Output

Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 580" BusID "PCI:9:0:0" EndSection    
Se…

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Fix for: Multiple GPUs in Linux - How to specify which GPU runs X windows

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If I read your config correctly, you seem to have Device0 = your 580 at PCI 9:0:0 and Device1 = your 480 at 7:0:0. Your screen0 is the pairing of your 580 (Device0) on Monitor0 and your screen1 the pair of your 480 and Monitor1. But on the other han…

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