.\"
.\" $FreeBSD: src/share/man/man4/acpi.4,v 1.61.8.1 2009/04/15 03:14:26 kensmith Exp $
.\"
-.Dd November 11, 2009
+.Dd February 10, 2013
.Dt ACPI 4
.Os
.Sh NAME
.It Li timer
.Pq Vt device
Implements a timecounter using the ACPI fixed-frequency timer.
+.It Li hpet
+.Pq Vt feature
+Supports the High Precision Event Timer.
.It Li video
.Pq Vt device
Supports
device.
.El
.Pp
-The
-.Nm
-driver comprises a set of drivers,
-which may be selectively enabled in case of testing.
-To enable a sub-driver,
-list it in the kernel environment variable
-.Va debug.acpi.enabled .
-Multiple entries can be listed,
-separated by a space.
-.Pp
-ACPI sub-devices and features that can be enabled:
-.Bl -tag -width ".Li sysresource"
-.It Li hpet
-.Pq Vt device
-Supports HPET.
-.El
-.Pp
+.\"The
+.\".Nm
+.\"driver comprises a set of drivers,
+.\"which may be selectively enabled in case of testing.
+.\"To enable a sub-driver,
+.\"list it in the kernel environment variable
+.\".Va debug.acpi.enabled .
+.\"Multiple entries can be listed,
+.\"separated by a space.
+.\".Pp
+.\"ACPI sub-devices and features that can be enabled:
+.\".Bl -tag -width ".Li sysresource"
+.\"[...]
+.\".El
+.\".Pp
It is also possible to avoid portions of the ACPI namespace which
may be causing problems, by listing the full path of the root of
the region to be avoided in the kernel environment variable