Re: Where is the magic SysReq key?

[Jonathan Billings]

On Apr 1, 2023, at 13:11, Patrick O'Callaghan <pocallag...@gmail.com> wrote: I have a Logitech MX series wireless keyboard, and no keys are labelled as SysRq or PrtScr. Is there a way to configure a different sequence for the magic SysRq function? The man pages are not helpful. https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html#i-hit-sysrq-but-nothing-seems-to-happen-what-s-wrong I hit SysRq, but nothing seems to happen, what’s wrong? There are some keyboards that produce a different keycode for SysRq than the pre-defined value of 99 (see KEY_SYSRQ in include/uapi/linux/input-event-codes.h), or which don’t have a SysRq key at all. In these cases, run showkey -s to find an appropriate scancode sequence, and use setkeycodes <sequence> 99to map this sequence to the usual SysRq code (e.g., setkeycodes e05b 99). It’s probably best to put this command in a boot script. Oh, and by the way, you exit showkey by not typing anything for ten seconds. --  Jonathan Billings

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