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how to restart fedora20 hangs system

asked 2014-09-22 12:40:40 -0600

wasan gravatar image

My hdd double boot system window 8 & fedora 20 . last time browsing use firefox fedora hanging only mouse work but keyboard not worked , then i try to restart ctl+alt+del not reponding.how to safely shutdown system.

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answered 2014-09-22 12:52:53 -0600

baoboa gravatar image

try to switch to a virtual terminal ctl+alt+F2 then you can reboot with ctl+alt+del or login to check which process is faulty ( usually gnome-shell in this case )

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did you read the post?! the computer doesn't recognize keyboard after it freeze so he can't press anything! actually he can press anything but there won't be any respond for that!!!!

MrSinaRJ gravatar imageMrSinaRJ ( 2014-09-23 01:22:41 -0600 )edit

ok, if nothing work you have no choice but to reboot it with the power switch (press 6 sec)

baoboa gravatar imagebaoboa ( 2014-09-23 04:14:16 -0600 )edit

ok.thanks virtual terminal works press ctl+atl+F2 then log in.revert to desktop ctl+atl+F1 .

wasan gravatar imagewasan ( 2014-09-23 21:05:29 -0600 )edit
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answered 2014-09-23 01:21:37 -0600

MrSinaRJ gravatar image

I had the same problem with my laptop, the only way you can have is to turn it off by holding the power button

I mean the only way is a hard shutdown

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answered 2014-09-22 20:14:31 -0600

wapello gravatar image

You can use the Sysrq key, this works even if you cannot go to a virtual terminal. However this is disabled by default on Fedora, so if you haven't enabled it, it will not work.

You have to enable it as a kernel parameter in /etc/sysctl.conf this article walks you through it: http://fedoraproject.org/wiki/QA/Sysrq#How_do_I_enable_the_magic_SysRq_key.3F

Key sequence you want is REISUB, this article describes how to use it, and what each step does: http://en.wikipedia.org/wiki/Magic_SysRq_key#Commands

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Asked: 2014-09-22 12:40:40 -0600

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Last updated: Sep 23 '14