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I'm trying to find a way to accurately determine whether all the hardware on some system has a valid driver installed either via a kernel module or built-in to the kernel.

I'm working with RHEL 5.5 on a Dell Optiplex 990.

I know that lspci is a good starting point, but it's not reliable because it could be manually updated and new drivers don't always update it. I know that I can look look at /lib/modules/$(uname -r)/modules.pcimap to find out whether there is a driver module for the device base on the ID, but what about built-in drivers? I've installed a new kernel and I'm trying to find out whether the built-in agpgart-intel module supports the host bridge with vendor:device ID 8086:0100.

Also, is there a proper procedure for updating the pci.ids list when updating the kernel? I know I could just update everything using update-pciids or by downloading the list from the internet, but doesn't it make more sense to only include IDs supported by the current install?

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That's not exactly what you're looking for so I don't post it as an answer but it could be of some help: kmuto.jp/debian/hcl. (I didn't notice before but it uses a quite old PCI map) –  lgeorget Apr 27 '13 at 2:24
Thanks, but yea, that doesn't really give me anything I don't already know. –  deuberger Apr 29 '13 at 15:13
maybe ls /sys/bus/pci/devices/*/driver -l? –  Alex Oct 16 '13 at 23:02

1 Answer 1

If you know the Kbuild symbols for the desired drivers, you can check /proc/config.gz or any other source of kernel configuration available (distributions usually place config in /boot alongside the kernel, or you could extract the config from the kernel with scripts/extract-ikconfig from the kernel source tree - provided the configuration was compiled into the kernel of course).

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I might be misunderstanding, but I don't think that's what I'm looking for. The config will tell me whether a particular driver is built in, but not whether that driver supports the particular PCI ID that I need a driver for. Is that right? –  deuberger Sep 17 '13 at 16:19
Yes, for that you have to look into the sources and/or documentation, I'm afraid. –  peterph Sep 17 '13 at 17:28

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