Hi,
nidhi mittal hada wrote:
Hi All
I want to use magic sysrq key functioning
I have enabled in /etc/sysctl.conf
kernel.sysrq = 1
but when i press alt + sysrq it asks me to take a screenshot
on my Logitech keyboard i have prntscreen / sysrq on same key
and i dont have any fn key on it
How do i enable sysrq key ; i have googled for it but no answer
that could solve it
if anyone has faed same prob and got solution too
pl answer
--
Thanks & Regards
Nidhi Mittal Hada
Scientific officer D
Computer Division
Bhabha Atomic Research Center
Mumbai
Magic SysRequest = Alt + SysRq + <key>
First you have to make sure your kernel supports this feature, otherwise
you have to enable it:
Kernel hacking -> Magic SysRq key (CONFIG_MAGIC_SYSRQ)
In some kernel versions you then have an active Magic SysRequest key,
but in other kernels you first have to do
echo 1 > /proc/sys/kernel/sysrq
to activate this key. A command is given by pressing three keys
simultaneously: Alt-SysRq-X, where X is the command letter. (On a serial
console one gives a Break, followed by the command letter.)
Since Linux 2.4.21/2.5.66 it is also possible to do
echo X > /proc/sysrq-trigger
with the same effect as the keystroke.
Command letters
* r Set kbd mode to XLATE (not RAW)
* k SAK (Secure Attention Key)
* b Immediate reboot, no umount, no sync
* o Shut Off system
* s Sync
* u Remount all filesystems read-only
* p Print registers on console, like Show_Registers below.
* t Print tasks on console, like Show_State below.
* m Print memory info on console, like Show_Memory below.
* 0-9 Set console loglevel
* e Send every process SIGTERM
* i Send every process SIGKILL
One should make sure that this facility is always switched off in a
production environment.
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