machine won't reboot

Jul 15, 2004 3 Replies
D

Hi,



I've got an x86 machine that I can't get to reboot in any way, shape or form when it doesn't have a keyboard attached to it. Any suggestions for how to accomplish this?



I've been poking through the kernel sources, and have tried the various reboot= options, but none of them seems to have any effect. The machine just stops and doesn't turn over. Oddly enough, when a keyboard is attached, things seem to go ok (must be due to the mach_reboot call using the... *keyboard* of all things?!).



Thankyou, Dave


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M

Is this a PC ? Does it hang before the linux loader is started ?

Here you often have a BIOS option for this. Some PCs can't start without the keyboard at all.

This is why some keyboard/monitor switches have a simulated keyboard for each PC.

-Michael

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D

No, it doesn't reboot at all. It doesn't get to the BIOS or anything like that. It gets to the mach_reboot code in the kernel and just stops.

That I would have understood, I've seen that before. This just seems to hang/halt the computer without rebooting it.

Thanks, Dave

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C

Some old AT based machines do that. They didn't fully support the ATX reboot/shutdown methods so they would just hang on restarts.

Charlie Brej APT Group, Dept. Computer Science, University of Manchester Web: http://www.cs.man.ac.uk/~brejc8/ Tel: +44 161 275 6844 Mail: IT302, Manchester University, Manchester, M13 9PL, UK
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