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-   -   What does pci=nommconf do? (http://www.linuxquestions.org/questions/linux-newbie-8/what-does-pci%3Dnommconf-do-689415/)

aminthemachine 12-09-2008 03:38 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 06:11 PM

According to Documentation/kernel_parameters.txt:

Quote:


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 08:01 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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