Linux Kernel Magic SysRq keys in openSUSE for crash recovery


  1. Are you quite sure you don’t need to press ‘Ctrl’, too? All previous explanations of this feature I have seen require ‘Ctrl’ + ‘Alt’ + SysRq’ + additional keys. ‘Alt’ + SysRq’ should, thanks to the function of the Print Screen feature, only lead to a screenshot to be dumped.

    In addition, most notebook users will additionally have to press the Fn key to be able to access SysRq. Yes, a third hand comes in handy. 😉


  2. @Robin — No, ‘Ctrl’ isn’t required.

    I’ve used the ‘Alt+SysRq+r e i s u b’ sequence before on a couple of different linux systems. Usually because it wouldn’t respond to other nicer shortcuts like Ctrl+Alt+Backspace (kill X server) or Ctrl+Alt+Delete (restart computer or open shutdown dialoge, depending on your environment).
    I have also gotten into Really bad situations where even ‘Alt+SysRq… didn’t work, which is sad because I have to hard-shutdown the computer.

  3. no, you don’t need ctrl. _Fn key might be required though. prt screen feature should work with print key alone. no need for alt. although, again, some of us will need Fn key

  4. Why can`t I use key? But such commands “echo p > /proc/sysrq-trigger” is useful.

  5. Hello

    I am using OpenSuse 12.1 with XFCE.
    I don’t see the ENABLE_SYSRQ in the sysconfig editor and /etc/sysconfig/sysctl doesn’t exist …
    What do I do ?
    Thank you for your support !


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