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Public bug reported:


VERSION="13.10, Saucy Salamander"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 13.10"
VERSION_ID="13.10"

vmlinux-3.11.0-5-powerpc-e500mc


When SysRQ is enabled through  /proc :

  
  echo 1 > /proc/sys/kernel/sysrq

 
All responses from SysRQ  sequences are redirected to /var/log/syslog , not the serial console. 

For instance:

 SySRQ ( break )  l

Is suppose to report CPU stack traces .  The summary is sent to v/var/log/syslog , not the serial port, which 
defeats the entire purpose of SysRQ feature which is intended for diagnostics of server issues.

The logging behavior can redirected to the console by using :

 dmesg --console-on

This should be the default behavior for ppc ; It is also how x86 has
worked in the past.

** Affects: linux-ppc (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1282201

Title:
  SysRQ over serial console redirects to syslog

Status in “linux-ppc” package in Ubuntu:
  New

Bug description:
  
  VERSION="13.10, Saucy Salamander"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 13.10"
  VERSION_ID="13.10"

  vmlinux-3.11.0-5-powerpc-e500mc

  
  When SysRQ is enabled through  /proc :

    
    echo 1 > /proc/sys/kernel/sysrq

   
  All responses from SysRQ  sequences are redirected to /var/log/syslog , not the serial console. 

  For instance:

   SySRQ ( break )  l

  Is suppose to report CPU stack traces .  The summary is sent to v/var/log/syslog , not the serial port, which 
  defeats the entire purpose of SysRQ feature which is intended for diagnostics of server issues.

  The logging behavior can redirected to the console by using :

   dmesg --console-on

  This should be the default behavior for ppc ; It is also how x86 has
  worked in the past.

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