[CentOS] Tyan S2891 and CentOS -- 6, 8, 10+ PCI busses in today's new systems
rik at harddata.com
rik at harddata.com
Fri Dec 2 16:32:12 UTC 2005
> rik at harddata.com wrote:
>> Thanks for the hints on using pci=. I got it to work.
>> I couldn't find where pci=bios was documented but that
>> option didn't work.
>
> Boot Prompt HOWTO, Section 4:
> http://www.tldp.org/HOWTO/BootPrompt-HOWTO-4.html
>
>> I read in the kernel docs in regards to booting and tried
>> pci=conf1 and this worked.
>
>>From the HOWTO ...
>
> 4.2 The `pci=bios' and `pci=nobios' Arguments
> These are used to set/clear the flag indicating that
> the PCI probing is to take place via the PCI BIOS.
> The default is to use the BIOS.
> 4.3 The `pci=conf1' and `pci=conf2' Arguments
> If PCI direct mode is enabled, the use of these enables
> either configuration Type 1 or Type 2. These implicitly
> clear the PCI BIOS probe flag (i.e. `pci=nobios') too.
This must be old documentation. The pci=nobios flag didn't work.
The problem was fixed by adjusting a BIOS setting. By changing the
Installed OS to Linux I am able to boot the machine without any boot
flags.
>
> So you actually want to use "pci=nobios" (my bad).
Rik
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