Can cron cause computer to wake up from hibernate?

Buchbinder, Barry (NIH/NIAID) [E]
Tue Oct 2 11:43:00 GMT 2007

> Saurabh Tendulkar wrote:
>> Hi,
>> I'm trying to troubleshoot why my pc comes out of hibernate. It seems
>> like some of the times this happens correspond to cron jobs. Is it
>> possible that cron could be (one of) the culprit(s) here? If so, is
>> there a way to prevent cron from waking up the computer? Thank you.
>> saurabh
Danilo Turina wrote on Tuesday, October 02, 2007 3:50 AM:
> Some time ago, it happened to me that my PC came out of hibernate
> without no apparent reason. 
> Initially I though that someone, accidentally, hit the keyboard
> causing the resume of the PC, but after disabling keyboard switch on,
> the problem persisted.  
> I then discovered that my network card was configured to wake up the
> PC when receiving certain kind of packets. Disabling that feature did
> the job.  

Many BIOSs can wake up the computer at specific times.  I'm not sure,
but I seem to remember having had a BIOS that that mentioned something
like waking up when receiving something from the network, so you might
also look for that.

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