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Troubleshooting headless reboot failures - where to start


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Posted

Formany years now I've had an intermittent issue where my server fails to restart properly but only when there is no monitor connected.

 

When I say intermittent, I'd say anecdotally, it reboots properly maybe 1 in 5 times, but the other 4 times, it just doesnt come back up after rebooting. If it fails to come back up, and I connect a monitor, then I get a completely black screen. If I then reboot it again with the monitor connected, then everything works fine.

 

Given that if I reboor my server twice a year its a lot, this hasnt really been very high on my list of things to sort out. After doing some research a while back I bought a dumb HDMI plug to connect to the server but that hasnt made any difference. 

 

For reference, its an 5th gen Intel i5 with onboard graphics, although I also added a discrete video card which made no difference so I took it out again.

 

Could anyone perfhaps provide some thoughts on how best to go about troubleshooting this?

Posted

Leave a monitor connected? The HDMI plug should have done the same thing, possibly it's was bad? Not much else you can try, since this is not a software problem, some boards/GPUs don't post if they don't detect a monitor, though it's strange sometimes it does.

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