On Mon, 2012-08-20 at 16:27 +0200, Reindl Harald wrote:
>
> Am 20.08.2012 16:21, schrieb Aaron Konstam:
>> On Mon, 2012-08-20 at 16:00 +0200, Reindl Harald wrote:
>>>
>>> Am 20.08.2012 15:55, schrieb Aaron Konstam:
>>>>> If a system hangs, the most important thing is to get all your data
>>>>> written to disk, to minimize data loss. This is done by pressing
"S",
>>>>> after pressing and holding down AltGr+Prt(SysRq). An often cited and
>>>>> well known combination (and easy to remember) is R-E-I-S-U-B.
>>>>>
>>>>> Hope this helps!
>>>>
>>>> Well I need to ask .What key is AltGR? and Prt and SysReg are the same
>>>> key. So what keys are you pressing?
>>>
>>> forget the AltGr
>>> it is the same as CTRL+ALT and on most keyboards the right ALT-key
>>>
>>> CTRL+ALT+PRINT = SysRQ
>>> CTRL+ALT+PRINT+S = emergency sync
>>>
>>>
http://en.wikipedia.org/wiki/Magic_SysRq_key
>>>
>>
>> The web site is helpful, but the key sequences do not work.
>> In my case I am told to press ALT + Fn + SysRg , let up on Fn and let us
>> say press b. The system should reboot. There is a screen blink but no
>> reboot.
>> I can't make any of the options seem to work. What am I doing wrong?
>
> please post also to the list
>
> i am only using reply-all because moderated and it takes
> up to days until moderators are realsing posts here....
>
> "Fn" sounds like a notebook
> on many notebook-keaboards you need to press "Fn+Print" fro the
> print-key itself, so you need "CTRL+ALT+Fn+Print+S" for emergency sync
>
I did that. Bur CRTL+Alt+Fn+Prnt Scrn + b did not reboot the machine.
How do you make this feature work?
/etc/sysctl.conf:
kernel.sysrq = 1
followed by "sysctl -p" at least
for security this is NOT enabled as default