Ubuntu
linux package

  1. Bug #194676
  2. Comment #10

Comment 10 for bug 194676

Revision history for this message
Matt Taggart (taggart) wrote :

This is a security issue as someone can use sysrq to disable screen locking and cause other problems.

Debian uses "438" by default in squeeze and newer. Here are some relevant bugs,

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=562884
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=564080

The bitmask description documented at
https://secure.wikimedia.org/wikipedia/en/wiki/Magic_SysRq_key#Disabling_SysRq_key