How to make a remote reboot when system has panic'ed ?

Nathan Whitehorn nwhitehorn at freebsd.org
Mon Jan 12 06:26:21 PST 2009


Niels S. Eliasen wrote:
> hi guys
> Having some issues with the current kernel getting sound and keyboard 
> working (thanks sofar Nathan! ) made me think about how to reboot when 
> the system has panic'ed...  remotely ??
> ie. a virtual CTRL-OPTION-POWER ?
> is that possible at all?

How remotely? During a panic, there is necessarily no network access. 
Typing reset at the debugger prompt, though, via a serial console or 
firewire (dcons) will cause a reboot, and the machine with the other end 
of the console can be connected to the network.

> and at the same time.... How about a automatic reboot after a 
> power-outage ? (the option is available within MacOSX/YDL Linux as well) ??
> just rambling ....

See the sysctl dev.pmu.0.server_mode.
-Nathan


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