Trimming the default /boot/device.hints
obrien at FreeBSD.org
Sat Jan 31 20:44:10 PST 2009
On Sat, Jan 31, 2009 at 09:26:08PM -0700, M. Warner Losh wrote:
> In message: <20090131093130.GA17896 at dragon.NUXI.org>
> "David O'Brien" <obrien at freebsd.org> writes:
> : At least for amd64, I'd like to see all the hints removed. We should
> : make these assumptions.
> We can't remove all hints, unless we require ACPI.
For the most part we do for amd64. Is there reason not to?
> The floppy drives
> don't enumerate properly without hints in the PNPBIOS case. I don't
> know if the floppies enumerate correctly for ACPI, but the code that's
> there seems to assume that enumerating via _FDE might fail sometimes
> and the fallback method is hints. This suggests that keeping the fd
> hints is a good thing.
> We also want hints to wire down uart0 and uart1 to their traditional
> COM1 and COM2 places. At least that's been an oft-reported bug when
> we don't.
> My current 'hints' file is thus:
That would be a great compromise hints file for amd64 given you are
right - I have seen a few motherboards have issues with which com
port is at which addresses.
-- David (obrien at FreeBSD.org)
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