RE: Can cron cause computer to wake up from hibernate?
On 03 October 2007 06:14, Andrew DeFaria wrote: Matthew Wozniski wrote: Hibernation does involve swapping everything in memory to disk, freezing the state of all processes, and powering down the system. But, the system being powered down does not mean that no part of the system is receiving power. In fact, Wake On LAN technology is designed to work on machines that are completely shut down - the only caveat is that the motherboard reserves power for the network card, and the network card scans for a particular magic packet addressed to it. If that packet shows up, the computer turns itself back on. This would be the first time that I've ever heard of this. Forgive me for saying but do you have a reference? http://www.google.com/search?q=wake+on+lan cheers, DaveK -- Can't think of a witty .sigline today -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Can cron cause computer to wake up from hibernate?
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. Ciao, Danilo 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 _ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
RE: Re: Can cron cause computer to wake up from hibernate?
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. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Can cron cause computer to wake up from hibernate?
Danilo Turina wrote: 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. Ciao, Danilo AFAICT that's not hibernation - that's sleep mode. There's a difference, hence the different terms. Hibernation mode involves placing the current contents of memory in swap and shutdown off, not down, the computer. It requires that you push the power button to start the boot up sequence. During boot up the computer notices that it was hibernating and says *Resuming* Windows not *Starting* Windows. Main memory is then taken from virtual memory and loaded into main memory and control is transfered to the scheduler. I use hibernate mode all the time. I once used it at work when we were moving from one building to another. During that time the computer was not even connected to the power source and indeed in a moving truck! When at the new building I powered it on and it came back exactly to where I had left it off prior to hibernating it. I don't think that that is what happened to you, rather I think that you were in sleep mode and the network card awoke your computer. Sleep mode can be gotten out of without having to press the power button and is nearly instantaneous. -- Andrew DeFaria http://defaria.com Why is a man who invests all your money called a broker? -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Can cron cause computer to wake up from hibernate?
On Tue, Oct 02, 2007 at 08:51:19AM -0700, Andrew DeFaria wrote: Danilo Turina wrote: 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. AFAICT that's not hibernation - that's sleep mode. There's a difference, ... I use hibernate mode all the time. I once used it at work when we were moving from one building to another. During that time the computer was not even connected to the power source and indeed in a moving truck! When at the new building I powered it on and it came back exactly to where I had left it off prior to hibernating it. Hibernation does involve swapping everything in memory to disk, freezing the state of all processes, and powering down the system. But, the system being powered down does not mean that no part of the system is receiving power. In fact, Wake On LAN technology is designed to work on machines that are completely shut down - the only caveat is that the motherboard reserves power for the network card, and the network card scans for a particular magic packet addressed to it. If that packet shows up, the computer turns itself back on. So, not only can this bring a computer out of sleep or hibernation, it can bring a computer out of a shutdown, too, as long as the device is still plugged in. ~Matt Wozniski -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Can cron cause computer to wake up from hibernate?
On Tue, Oct 02, 2007 at 08:51:19AM -0700, Andrew DeFaria wrote: Danilo Turina wrote: 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. AFAICT that's not hibernation - that's sleep mode. There's a difference, I use hibernate mode all the time. I once used it at work when we were moving from one building to another. During that time the computer was not even connected to the power source and indeed in a moving truck! When at the new building I powered it on and it came back exactly to where I had left it off prior to hibernating it. In fact, Wake On LAN technology is designed to work on machines that are completely shut down - the only caveat is that the motherboard reserves power for the network card, and the network card scans for a particular magic packet addressed to it. If that packet shows up, the computer turns itself back on. ~Matt Wozniski Oh it is definitely hibernate. I have never had the computer come out of shutdown though. I found partial answers here (http://support.intel.com/support/network/sb/cs-008459.htm) and here (http://groups.google.com/group/alt.comp.periphs.mainboard.abit/msg/c40efb06dce495d6). My computer does show ACPI. I'll try turning off my cable modem and see if it works. Thanks for the suggestions. saurabh _ FREE pop-up blocking with the new MSN Toolbar - get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Can cron cause computer to wake up from hibernate?
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 _ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Can cron cause computer to wake up from hibernate?
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. AFAIK nothing wakes a computer up out of hibernate mode except pushing the power button. Did you mean sleep mode? -- Andrew DeFaria http://defaria.com There's nothing more annoying than Stravinsky or the Sex Pistols being drowned out by You've got mail! -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
