path: root/Documentation
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authorLen Brown <len.brown@intel.com>2007-08-14 15:49:32 -0400
committerLen Brown <len.brown@intel.com>2007-08-14 15:49:32 -0400
commitc52a7419af18594426bc601d1ea346dbbcf71e28 (patch)
treeb964b0de460e3508e092efa3b69fbc7267aef735 /Documentation
parent3c1d36da1d5ed36979340efd233ddaacc45b0a02 (diff)
ACPI: thermal: create "thermal.crt=C" bootparam
Some hardware will malfunction at a temperature below the BIOS provided critical shutdown threshold. This hook allows moving the critical trip points down to a temperature which provokes a graceful shutdown before the hardware malfunction. http://bugzilla.kernel.org/show_bug.cgi?id=8884 WARNING: A trip-point override will not get noticed until the system delivers a temperature change event, or unless thermal zone polling is enabled. eg. "thermal.tzp=10" Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 975f029be25..18dcfdd29df 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1826,6 +1826,10 @@ and is between 256 and 4096 characters. It is defined in the file
-1: disable all active trip points in all thermal zones
<degrees C>: override all lowest active trip points
+ thermal.crt= [HW,ACPI]
+ -1: disable all critical trip points in all thermal zones
+ <degrees C>: lower all critical trip points
thermal.nocrt= [HW,ACPI]
Set to disable actions on ACPI thermal zone
critical and hot trip points.