ACPI regression on recent 7.0-STABLE: HPET stops working

Bruce Cran bruce at
Fri Sep 12 23:29:07 UTC 2008

On Wed, 23 Jul 2008 11:16:02 -0400
John Baldwin <jhb at> wrote:
> I've committed the patch.  However, I think this actually points out
> a slightly bigger issue in that the HPET timer is probably
> piggybacking on the ichsmb0 device's BAR, and they really should both
> be able to attach somehow.
> A way to fix that would be to make the HPET device actually borrow
> the PCI device's resource instead of allocating its own perhaps.  I
> think the HPET ACPI device and the table tell us the PCI deviec the
> HPET lives in.

I just upgraded from 7.0-p3 to 7.1-PRERELEASE on my Dell I1501 laptop
and hit this problem too.  I noticed the patch was committed to HEAD -
are there any plans to MFC it for 7.1?

Bruce Cran

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