Questions tagged [sysrq]
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.
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How do i use the sysrq key on chromebook running ubuntu mate?
Running ubuntu mate 22.04 on samsung chromebook 4 with mrchromebox's rwlegacy firmware.
I heard that the sysrq key for chromebook is alt+f10 (volume up) but when i try to do a reisub, the r makes the ...
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Is SysRq still a thing?
Reading this: https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html
I've been trying to use this on an ubuntu server VM to see what I can do, but I can't find the key combo. Could it be that ...
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debugng 2GB AWS server hang with Netbox, Python 3.8
I have a AWS t3.micro 2GB 20.04 machine, that i want to use for Netbox software. I created a RDS instance in AWS, so no DB problem on computing, back-end side.
When i complete all steps in the Netbox ...
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Ubuntu 22.04 keeps crashing hard
I have been having a problem for a couple of months.
Basically I have this workstation running ubuntu 22.04 at the office and it keeps crashing. On average I would say it crashes every day and a half ...
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Ubuntu freezes totally; Unresponsive to SysRq reisub; Happens on fresh installs of various distributions; I'm stumped
I have a workstation. I've had the same issue occur after fresh installs of various distributions: Ubuntu 21.04, Ubuntu 20.04, ElementaryOS.
The workstation has an AMD Threadripper Processor, ASUS ROG ...
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Recover Ubuntu after change of SysRq
On my Ubuntu 20.04, I wanted to change the SysRq value permanently with the command
# echo "kernel.sysrq = 244" >> /etc/sysctl.d/99-sysctl.conf
Since I did this, whenever I boot the ...
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Linux kernel on ubuntu 20.04 crash frequently
I am using Ubuntu 20.04 on Dell vostro 7500. But the whole system crash frequently. The symptom is the screen shows no response to keyboard event and mouse event(mouse cannot move or click), but the ...
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Tracking down a system freeze
Hey there I am doing yet another edit with newly gathered information.
So far there has been few responses here, so this will probably be the last one.
I am running a ThinkPad P14s with Ubuntu 20.04.
...
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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-...
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How does Alt+SysRq work on a DellXPS13?
sometimes my laptop freezes and normally I use the "magic SysRQ" combination to reboot it.
How does this work on my DellXPS13 ?
The closest question I could find was this one: How to get Alt+SysRq ...
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is it possible to create vmcore file?
here is my system:
base os: ubuntu 16.04
ubuntu 18.04 on virtualbox
mem 4G
cpu 2core
check kdump-config show
it said "ready to kdump"
then
sysctl -w kernel.sysrq=1
to make crash
echo c > /proc/...
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Ubuntu 18.10 is stuck at loading screen after new installation
Very much like:
Ubuntu 18.04 is stuck at loading screen after new installation
Except for being Ubuntu 18.10
The only way to interrupt a hung system like this, which simply never completes the boot ...
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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
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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 ...
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how to recover from a freeze without rebooting? [duplicate]
What alternatives are there to REISUB for dealing with system problems? The windows task manager has its good points in this regard. Or, key combination to logout. It's not always possible to get ...
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How can I enable the "magic sysrq key" on ubuntu desktop? [duplicate]
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 ...
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Ubuntu + PrtSc + AltGr = CRASH
On Ubuntu 15.10 and 15.04 on Lenovo t440p when I'm writing a code in Netbeans and accidently click button AltGr and PrtSc on same time it's crashed and reboot system. This not take action with fresh ...
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Sysrq magic key functionality check
The first time my laptop froze, I used the Alt+SysRq REISUB and it worked.
Next time it happened - it didn't work.
I edited the 10-magic-sysrq.conf file's line kernel.sysrq = 176 (changed it to value ...
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Disable PrtSc + B instareboot "feature"
How can I disable this: Magic SysRq key
The keyboard layout on my Lenovo Thinkpad X230 is such, that the keys Prt Sc and Ctrl are right next to eachother, as are the V and B keys and it is very ...
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Can Magic SysRq be used to switch workstations or kill specific processes?
My PC, running Ubuntu from a live CD, is frozen. I think it's because I have too many Firefox tabs open, which is overloading my memory. Is there anyway to use Magic SysRq to only kill Firefox? Or to ...
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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 ...
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REISUB not working when Ubuntu freezes
I am using 12.04 LTS on a Dell Inspiron 15 3521. Whenever the system hangs up with keyboard becoming unresponsive, REISUB does not give any results. Now I edited etc/sysctl.conf file as was suggested ...
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Alt-SysRq-E kills init
NOTE: Yes, I have a QWERTY keyboard. I also fully enabled SysRq with echo 1 > /proc/sys/kernel/sysrq while root earlier.
Tonight my laptop froze up while having Chromium and Minecraft open. After ...
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How can I troubleshoot why Ubuntu keeps crashing on my laptop? [closed]
I have a one year old Acer Aspire 4752G netbook running Kubuntu 12.04 LTS with all the latest distribution updates installed.
It was previously running great until about a week ago when it suddenly ...
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How do I diagnose Hang on Shutdown?
Since one or two months ago, my laptop with ubuntu 12.10x64 hangs during shutdown. There's just a black screen, no harddisk activity, it justs sits there. I feel it happens near the end of a normal ...
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How to give control over keyboard back to X server after Alt + SysRq + R trick
Situation: an application freezes the X server and no keyboard input works. So I use Alt+SysRq+R to take the keyboard out of raw mode (make the kernel take control of the keyboard away from the X ...
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How to get Alt+SysRq work on a Dell Latitude E6530?
I have a Dell Latitude E6530. The keyboard has a SysRq key (Fn+Home). However the magic keys (especially the famous REISUB) doesn't work.
SysRq is enabled in /proc/sys/kernel/sysrq (I get 1 if I cat ...
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Shut down computer from keyboard
Is there a keyboard shortcut available to shutdown the computer?
I know I can use the Power button, but I would like to be able to it from the keyboard.
If such a shortcut does not exist already, ...
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ALT+SysRq+REISUB hangs at "resetting" (without actually resetting/restarting)
I'm trying Alt + SysRq + REISUB to see how it would be used to restart my system safely in case of emergency.
However, I find that Alt + SysRq + REISUB hangs at "resetting" (without actually ...
user12681
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Alt + sysrq + REISUB doesn't reboot my laptop
On occasion, my laptop has become stuck so I've used the magic key combination of Alt + SysRq + REISUB to perform a safe reboot. However, it doesn't seem to work for me as when I press the B key to ...
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