Ubuntu: How to get Alt+SysRq work on a Dell Latitude E6530?


I have a Dell Latitude E6530. The keyboard has a SysRq key (Fn+Home). However the magic keys (especially the famous REISUB) doesn't work.

SysRq is enabled in /proc/sys/kernel/sysrq (I get 1 if I cat this file). It works from external USB keybord.

How can I have the Alt+SysRq+REISUB (in fact, Alt+Fn+Home+REISUB) reboot my system?


The Dell E6420 works as follows

  • Press/hold both Fn and Alt
  • Press/hold Home/Sysrq
  • Release Fn
  • Press key (tested with T)


The documentation (/usr/src/linux*/Documentation/sysrq.txt) says this:

On x86   - You press the key combo 'ALT-SysRq-<command key>'. Note - Some             keyboards may not have a key labeled 'SysRq'. The 'SysRq' key is             also known as the 'Print Screen' key. Also some keyboards cannot             handle so many keys being pressed at the same time, so you might             have better luck with "press Alt", "press SysRq", "release SysRq",             "press <command key>", release everything.  

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