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 can I troubleshoot why Ubuntu keeps crashing on my laptop?
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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29 views
Pause Virtual Machine before host Ctrl+Alt+REISUB
Ubuntu 13.04 commonly crashes (more often than linux should at least and I think its linked to a problem with PS/2 error handling...) and this forces me to run Ctrl+Alt+SysRq+REISUB to reboot it. I am ...
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333 views
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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1answer
73 views
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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1answer
704 views
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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575 views
How do I find the cause of a system crash/hang [closed]
My system has been crashing/hanging roughly once a day for the last month or so. I have also recently (over the weekend) upgraded to 12.04 in a misguided hope that something in the upgrade would ...
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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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1answer
247 views
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 ...
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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 ...
