1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 44d1bd142edf..99cf83fd6947 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -251,6 +251,14 @@ and is between 256 and 4096 characters. It is defined in the file
                         Warning: Many of these options can produce a lot of
                         output and make your system unusable. Be very careful.
 
+        acpi.power_nocheck=     [HW,ACPI]
+                        Format: 1/0 enable/disable the check of power state.
+                        On some bogus BIOS the _PSC object/_STA object of
+                        power resource can't return the correct device power
+                        state. In such case it is unneccessary to check its
+                        power state again in power transition.
+                        1 : disable the power state check
+
         acpi_pm_good    [X86-32,X86-64]
                         Override the pmtimer bug detection: force the kernel
                         to assume that this machine's pmtimer latches its value