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Document BIOS blacklist.

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Approved by:	njl
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marks 2004-06-30 19:54:29 +00:00
parent e5cb920c19
commit dd540d8a36
1 changed files with 19 additions and 1 deletions
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20
share/man/man4/acpi.4
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@ -208,6 +208,22 @@ Output from the
code follows the same format, but
the module name is uppercased.
.Pp
For machines known not to work with
.Nm
enabled, there is a BIOS blacklist. Currently, the blacklist only controls
whether
.Nm
should be disabled or not. In the future, it will have more
granularity to control features (the infrastructure for that is already there).
.Pp
To enable
.Nm
(for debugging purposes, etc.) on machines that are on the
blacklist, set the kernel environment variable
.Va hint.acpi.0.disabled
to 0. Before trying this, consider updating your BIOS to a more recent version
that may be compatible with ACPI.
.Pp
To disable the
.Nm
driver completely, set the kernel environment variable
@ -330,7 +346,9 @@ Name of the DSDT table to load, if loading is enabled.
.It Va debug.acpi.disabled
Selectively disables portions of ACPI for debugging purposes.
.It Va hint.acpi.0.disabled
Disables all of ACPI.
Set this to 1 to disable all of ACPI. If ACPI has been disabled on your
system due to a blacklist entry for your BIOS, you can set this to 0 to
re-enable ACPI for testing.
.It Va hw.acpi.ec.poll_timeout
Delay in milliseconds to wait for the EC to respond.
Try increasing this number if you get the error