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aminthemachine 12-09-2008 04:38 PM

What does pci=nommconf do?
Can anyone explain to me what this flag does exactly and how it works please. Thanks

sundialsvcs 12-09-2008 07:11 PM

According to Documentation/kernel_parameters.txt:


nommconf [X86-32,X86_64]
Disable use of MMCONFIG for PCI Configuration

This would normally be used only if you had some broken device on your PCI-bus... something with incorrect MCFG information in it.

Gsidious 12-09-2008 09:01 PM

mmconf is for memory mapped config space. pci=nommconf is not needed in most cases, but can resolve some issues if you have a buggy BIOS. Newer kernels seem to be able to work around a bad mmconf configuration from BIOS, it use to be that the kernel would hang with a bad mmconf and the pci=nommconf would work around that.

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