SysRq

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SysRq

#1

Post by IT-Werewolf »

It's probable that nobody will know the solution, but here goes:
My computer runs Linux Mint 17 Cinnamon.
Despite the fact that I have enabled all "magic SysRq" functions (value 1), my system reports that many functions, such as [alt][SysRq][e]/[k] are "disabled". If anybody has any theories on why this is so, please enlighten me.

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Re: SysRq

#2

Post by Leeward »

I have two theories:

1. Your keyboard requires some other modifier key (e.g. Fn key found on many laptops) to be pressed as well because SysRq is a secondary function on that key in that particular layout.

2. SysRq might be disabled by default in that particular flavour and to change that you're going to have to fiddle with (i.e. recompile) the kernel.
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Re: SysRq

#3

Post by IT-Werewolf »

Like I said, SOME combinations work, like the sync, remount, reboot, and powerdown functions, even and the SysRq setting is at 1.
It IS possible that the guys who assembled the distro tore out the other functions, in which case all is lost...

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Re: SysRq

#4

Post by Leeward »

Hmm, then I don't know. Have a look here, it mentions some useful tricks: http://unix.stackexchange.com/questions ... -invoke-it
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Re: SysRq

#5

Post by Leeward »

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Re: SysRq

#6

Post by Fluke »

Use Windows.
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Re: SysRq

#7

Post by IT-Werewolf »

Fluke wrote:Use Windows.
You... Work for them, don't you? -_-
Be gone fiend! XD
Seriously though: No. I prefer Linux Mint.
Not that I have anything against Windows 7, but (1) it's expensive and (2) I don't even know if it's still sold. Win 8 can go take a running jump.
Plus, that suggestion still doesn't help, because ctrl+alt+del also doesn't have the functions I'm looking for.

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Re: SysRq

#8

Post by Leeward »

I prefer Ubuntu personally, but I actually quite like Windows 7 for gaming and other pleb stuff. One way around those two cons is simply not to buy it, if you catch my drift. But yeah, not helpful.
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Re: SysRq

#9

Post by Kangee Gold »

Have you tried turning it off and back on again?

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Re: SysRq

#10

Post by IT-Werewolf »

Yes. Didn't help.

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Re: SysRq

#11

Post by Leeward »

Anything useful in those links?
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Re: SysRq

#12

Post by Fluke »

Why are you even using it?
It implies you're constantly facing hardware/software issues - which you should fix.

It's the equivalent of saying: "My car's battery is consistently dying in the morning, I need an industrial method to jump-start it!"
No. Just replace the battery.
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Re: SysRq

#13

Post by IT-Werewolf »

I'm using it so I can learn how to use it when I need it.
Yes. I do need a new computer. You got a few thousand lying around for me?

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Re: SysRq

#14

Post by Leeward »

If all else fails, switch distros?
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Re: SysRq

#15

Post by Fluke »

IT-Werewolf wrote:I'm using it so I can learn how to use it when I need it.
Yes. I do need a new computer. You got a few thousand lying around for me?
http://www.microsoft.com/en-us/software ... ndows10iso
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Re: SysRq

#16

Post by Rakuen Growlithe »

Fluke wrote:
IT-Werewolf wrote:I'm using it so I can learn how to use it when I need it.
Yes. I do need a new computer. You got a few thousand lying around for me?
http://www.microsoft.com/en-us/software ... ndows10iso
Why would you recommend that? Might as well just give him a sledgehammer and tell him to hit his computer till it works better.
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Re: SysRq

#17

Post by IT-Werewolf »

Rakuen Growlithe wrote:
Fluke wrote:
IT-Werewolf wrote:I'm using it so I can learn how to use it when I need it.
Yes. I do need a new computer. You got a few thousand lying around for me?
http://www.microsoft.com/en-us/software ... ndows10iso
Why would you recommend that? Might as well just give him a sledgehammer and tell him to hit his computer till it works better.
Exactly! XD
Thank you, "Rakuen"! YOU get it.
I seriously think "Fluke" works for Microsoft.

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Re: SysRq

#18

Post by Kangee Gold »

IT-Werewolf wrote:Yes. Didn't help.
Delete System32 then try again.

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Re: SysRq

#19

Post by Leeward »

Kangee-Gold wrote:Delete System32
Haven't you heard? He's using Linux. "rm -rf /" is more like it.
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Re: SysRq

#20

Post by IT-Werewolf »

Solution:
Some functions have been disabled since Ubuntu 12.10

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Re: SysRq

#21

Post by Leeward »

Really? I've used Alt+SysRq+REISUB on Ubuntu 14.04 a few times and never noticed anything not working. But then again I was only trying to gently knock out a frozen PC so I wouldn't have been able to tell anyway.

Thanks for sharing the solution, it will be helpful if anyone come across the problem in future.
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Re: SysRq

#22

Post by IT-Werewolf »

Even the Linux 4.0.5 kernel for Mint/Ubuntu has it disabled, it seems...

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