[FE training-materials-updates] Magic SysRq: explicit on Picocom

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=4eeabeffaa0afccfc9ea2e2b22f92d3acdc5ee3f

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commit 4eeabeffaa0afccfc9ea2e2b22f92d3acdc5ee3f
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Fri Dec 16 08:51:24 2016 +0100

    Magic SysRq: explicit on Picocom
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


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4eeabeffaa0afccfc9ea2e2b22f92d3acdc5ee3f
 .../kernel-driver-development-debugging.tex                      | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/slides/kernel-driver-development-debugging/kernel-driver-development-debugging.tex b/slides/kernel-driver-development-debugging/kernel-driver-development-debugging.tex
index 3a5066b..4186539 100644
--- a/slides/kernel-driver-development-debugging/kernel-driver-development-debugging.tex
+++ b/slides/kernel-driver-development-debugging/kernel-driver-development-debugging.tex
@@ -171,12 +171,15 @@ dev_info(&pdev->dev, "in probe\n");
   \item Allows to run multiple debug / rescue commands even when the
     kernel seems to be in deep trouble
     \begin{itemize}
-    \item On PC: \code{[Alt]} + \code{[SysRq]} + \code{<character>}
-    \item On embedded: break character on the serial line +
-      \code{<character>}
+    \item On PC: press \code{[Alt]} + \code{[SysRq]} + \code{<character>}
+	  simultaneously
+    \item On embedded: in the console, send a break character
+      (Picocom: press \code{[Ctrl]} + \code{a} followed by \code{[Ctrl]}
+      + \code{\ }), then press \code{<character>}
     \end{itemize}
   \item Example commands:
     \begin{itemize}
+    \item \code{h}: show available commands 
     \item \code{s}: sync all mounted filesystems
     \item \code{b}: reboot the system
     \item \code{n}: makes RT processes nice-able.