Key combinations made with alt, the sysrq key and another key are executed by the kernel whatever the state of the system; if it is frozen the classic command is to combine alt and the sysrq key with REISUB, which will safely close processes and reboot the system.
Questions tagged [sysrq]
30 questions
23
votes
1 answer
How can I enable the "magic sysrq key" on ubuntu desktop?
The magic SysRq key does not work on my Ubuntu 16.04 desktop. I imagine it's now disabled by default. My attempts to enable it did not work, and the only thing Google finds is a 2007 forum post from when it was apparently enabled by default.
Can I…
Arlie Stephens
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7
votes
1 answer
How to use Magic SysRq Key, if theres no SysRq key on my keyboard
https://en.wikipedia.org/wiki/Magic_SysRq_key
According to this it's very important.
What I can do?
Can I rebind this key to something else?
user691979
1
vote
1 answer
Could not see help from sysrq command
I'm trying to use some SysRq commands on Ubuntu. I use the following to enable SysRq commands - echo "1" > /proc/sys/kernel/sysrq and then I want to see help by writing h into sysrq-trigger under /proc, but I can't see nothing on stdout.
You can see…
0
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0 answers
Unable to login after sysRq+REISUB
I was watching a Youtube video and playing around with a C++ script, when the OS got completely frozen.
I did Alt+SysRq+REISUB, so it rebooted.
But I am now able to login as guest only.
My user login (from which I was originally working) just idle…
asdf1234
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0
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2 answers
Does the Magic SysRq Key Always Work?
My computer is running Ubuntu from a Live CD and is frozen to the point where I can't even turn num lock on and off. Does the Magic SysRq key work even now? And is it something that's enables by default or does it need to be enabled by the user?
Rayman
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