Gentoo Archives: gentoo-user

From: Mick <michaelkintzios@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] How can I trigger kernel panic?
Date: Thu, 15 Mar 2012 19:44:39
Message-Id: 201203151943.27914.michaelkintzios@gmail.com
In Reply to: Re: [gentoo-user] How can I trigger kernel panic? by Paul Hartman
1 On Thursday 15 Mar 2012 19:36:16 Paul Hartman wrote:
2 > On Thu, Mar 15, 2012 at 2:25 PM, Michael Mol <mikemol@×××××.com> wrote:
3 > > On Thu, Mar 15, 2012 at 3:17 PM, Mick <michaelkintzios@×××××.com> wrote:
4 > >> On Thursday 15 Mar 2012 17:02:15 Michael Mol wrote:
5 > >>> On Thu, Mar 15, 2012 at 12:55 PM, Jarry <mr.jarry@×××××.com> wrote:
6 > >>> > On 14-Mar-12 19:41, ZHANG, Le wrote:
7 > >>> >> > So my question is: Can I somehow deliberately trigger
8 > >>> >> > "kernel panic" (or "kernel oops")?
9 > >>> >>
10 > >>> >> For panic, echo c > /proc/sysrq-trigger
11 > >>> >
12 > >>> > After I issued the above mentioned command, my system
13 > >>> > instantly "froze to death". Nothing changed on screen,
14 > >>> > no "kernel panic" or "Ooops" screen. Just frozen...
15 > >>> >
16 > >>> > No reaction to keyboard or mouse. No auto-reboot either.
17 > >>> > The only thing I could do is to press "Reset". Not exactly
18 > >>> > what I have been expecting...
19 > >>>
20 > >>> Were you running under X? The panic would have killed X, which
21 > >>> wouldn't have released control over the video hardware.
22 > >>>
23 > >>> There's a SysRq sequence to get around this, but I don't remember it.
24 > >>
25 > >> Ctrl+Alt+
26 > >>
27 > >> R E I S U B
28 > >>
29 > >> (busier in reverse)
30 > >>
31 > >> After a E or I you should be back into a console, unless things are
32 > >> badly screwed.
33 > >
34 > > Is that Ctrl+Alt+SysRq+(R E I S U B), or is the SysRq key not actually
35 > > used?
36 >
37 > Sysrq is definitely required :) Ctrl, on the other hand, is optional.
38 > And AltGr may be substituted for Alt.
39
40 Oops! yes, I meant to write SysRq ... sorry!
41 --
42 Regards,
43 Mick

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