fix /proc/sys/kernel/sysrq set it to 2, we had 1,
	When running a kernel with SysRq compiled in,
	/proc/sys/kernel/sysrq controls the functions allowed to be invoked via
	the SysRq key. By default the file contains 1 which means that every
	possible SysRq request is allowed (in older versions SysRq was disabled
	by default, and you were required to specifically enable it at run-time
	but this is not the case any more). Here is the list of possible values
	in /proc/sys/kernel/sysrq:
	   0 - disable sysrq completely
	   1 - enable all functions of sysrq
	  >1 - bitmask of allowed sysrq functions (see below for detailed function
	       description):
	          2 - enable control of console logging level
	          4 - enable control of keyboard (SAK, unraw)
	          8 - enable debugging dumps of processes etc.
	         16 - enable sync command
	         32 - enable remount read-only
	         64 - enable signalling of processes (term, kill, oom-kill)
	        128 - allow reboot/poweroff
	        256 - allow nicing of all RT tasks

	You can set the value in the file by the following command:
	    echo "number" >/proc/sys/kernel/sysrq

	Note that the value of /proc/sys/kernel/sysrq influences only the invocation
	via a keyboard. Invocation of any operation via /proc/sysrq-trigger is always
	allowed (by a user with admin privileges).