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I've recently installed Ubuntu 9.10 on a desktop machine as the only OS. If put in a hibernate, it wakes up normally, but if turned off completely, after turning on there is no "beep" sound from BIOS and HD lamp blinks for a while then stops.

When I hit reset in that state, it boots normally. What is going on and how could I fix it?

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Is that a new computer or did was it up and running with some other OS for some time? – Bobby Apr 6 '10 at 8:25
Had windows before, and it booted normally. It's 2-3 years old. – Slartibartfast Apr 6 '10 at 8:42
Is the function you're using really hibernate? Or is it suspend? – goedson Apr 9 '10 at 11:42
both suspend to ram, and hibernate work ok. – Slartibartfast Apr 11 '10 at 10:30

I expect your BIOS to not be finding the hard disk drive because it's not powering up fast enough. That would explain why it works after a reset.

If you enter the BIOS, does the boot run normally after you exit it? Have you tried with another hard disk?

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