ACPI regression on recent 7.0-STABLE: HPET stops working

John Baldwin jhb at
Mon Sep 15 20:49:46 UTC 2008

On Friday 12 September 2008 07:28:50 pm Bruce Cran wrote:
> 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?

I will MFC it.

John Baldwin

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