> -----Original Message----- > From: Adam Nielsen [mailto:[email protected]] > Sent: 21 December 2009 02:30 > To: Graham Adams > Cc: [email protected] > Subject: Re: Auto wake on Poweredge 2700 ? > > > We have some new Poweredge 2700 servers. So far two have been > > configured and SLES 10 SP2 x86_64 installed. If they are shut down > they > > both automatically power up just after midnight . > > I believe (on standard PCs at least) this wake up time is set by > configuring an RTC alarm. I would try to find some way of checking the > RTC to see if an alarm time is set, and disable that. Linux seems to > support this at the kernel level, but I'm not aware of a program that > utilises it. A couple of things I can think of: > > - Have another look through the BIOS and be sure there's nothing > about > alarms, PME wakeup events, wake on IRQ0 or anything else involved with > the RTC. > > - Use the Dell Diagnostics CD. They're surprisingly thorough, I > wouldn't be surprised if they test the RTC. When the test is complete > it may leave the alarm disabled. > > - Unplug the machine's power and remove the CMOS battery for a few > minutes if you can. This should cause the system clock to be reset, > hopefully losing the alarm time in the process. > > Cheers, > Adam.
Hello Adam, Running the diagnostics didn't help but you pointed me in the right direction with the RTC alarm. I found this was set to (according to /proc/acpi/alarm) "2009-12-00 00:00:00" . This seems to mean wake up at midnight every day. By changing this to a specific day I can stop the alarm repeating daily but I think it will still repeat monthly because if I try to set it to, say, "2009-11-01 01:01:01" then read it back it returns "2009-12-01 01:01:01", presumably because the RTC chip is one without year and month fields in the alarm. I am going to try to disable the RTC alarm IRQ using the ioctl documented at the rtc(4) man page. Thanks for your help, Graham _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
