Module: xenomai-2.6
Branch: master
Commit: c15770aa99421319532e7cfed279351352599573

Author: Mariusz Janiak <>
Date:   Sun Dec 30 23:32:03 2012 +0100

doc: add doc about C1E option with AMD processors


 doc/asciidoc/TROUBLESHOOTING.adoc |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/doc/asciidoc/TROUBLESHOOTING.adoc 
index 7ed01d6..0380bae 100644
--- a/doc/asciidoc/TROUBLESHOOTING.adoc
+++ b/doc/asciidoc/TROUBLESHOOTING.adoc
@@ -188,6 +188,7 @@ The most probable reason is that Xenomai could not find a 
 Check that you have not enabled one of the options in the
 <<kconf,"Kernel configuration">> section.
 On x86
@@ -216,6 +217,24 @@ default by the BIOS. You may want to look at the file
 more information about this parameter.
+On AMD x86_64
+You will most likely also see the following message:
+I-pipe: cannot use LAPIC as a tick device
+I-pipe: disable C1E power state in your BIOS
+Xenomai sends this message if C1E option is enabled in a BIOS. To fix
+this issue please disable C1E support in the BIOS. In some Award BIOS
+this option is located in the +Advanced BIOS Features->+ menu (+AMD
+C1E Support+).
+IMPORTANT: Disabling +AMD K8 Cool&Quiet+ option in a BIOS does not
+solve the problem.
 On other supported platforms

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