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author | marks <marks@FreeBSD.org> | 2004-06-30 19:54:29 +0000 |
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committer | marks <marks@FreeBSD.org> | 2004-06-30 19:54:29 +0000 |
commit | dd540d8a364fce11342aef7df02f2c8b0b5871e2 (patch) | |
tree | 770bdbf275fe13b8224d709c355626b1fc6f87cb /share | |
parent | e5cb920c198977e7ccd1a6cea21c52f8cc934045 (diff) | |
download | FreeBSD-src-dd540d8a364fce11342aef7df02f2c8b0b5871e2.zip FreeBSD-src-dd540d8a364fce11342aef7df02f2c8b0b5871e2.tar.gz |
Document BIOS blacklist.
Approved by: njl
Diffstat (limited to 'share')
-rw-r--r-- | share/man/man4/acpi.4 | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/share/man/man4/acpi.4 b/share/man/man4/acpi.4 index 575a975..2d945cf 100644 --- a/share/man/man4/acpi.4 +++ b/share/man/man4/acpi.4 @@ -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 |