While setting up sysrq operation on the XO laptop (which lacks a SysRq key), i noticed that the documentation was quite out of date. paul commit 9ef04356bc49063fa1c09af4a9cb00352c455dcf Author: Paul Fox <pgf@xxxxxxxxxx> Date: Mon Nov 23 10:32:56 2009 -0500 Change documentation of SysRq to reflect current KEY_SYSRQ value. Signed-off-by: Paul Fox <pgf@xxxxxxxxxx> diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt index d56a017..5c17196 100644 --- a/Documentation/sysrq.txt +++ b/Documentation/sysrq.txt @@ -177,13 +177,13 @@ virtual console (ALT+Fn) and then back again should also help. * I hit SysRq, but nothing seems to happen, what's wrong? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -There are some keyboards that send different scancodes for SysRq than the -pre-defined 0x54. So if SysRq doesn't work out of the box for a certain -keyboard, run 'showkey -s' to find out the proper scancode sequence. Then -use 'setkeycodes <sequence> 84' to define this sequence to the usual SysRq -code (84 is decimal for 0x54). 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. +There are some keyboards that produce a different keycode for SysRq than the +pre-defined value of 99 (see KEY_SYSRQ in include/linux/input.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> 99' to 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. * I want to add SysRQ key events to a module, how does it work? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ =--------------------- paul fox, pgf@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html