The following reply was made to PR kern/73823; it has been noted by GNATS. From: Andriy Gapon <[email protected]> To: AW <[email protected]> Cc: [email protected], Bruce Cran <[email protected]> Subject: Re: kern/73823: [request] acpi / power-on by timer support Date: Mon, 06 Sep 2010 10:14:45 +0300
on 06/09/2010 09:54 AW said the following: >> Can someone (Bruce?) explain to me in greater detail what this PR is about? >> > I believed that the box can boot at the specified time if Linux powers it > down... > and that it cant, if FreeBSD does it... > >> I thought that the functionality of turning power on at certain time >> completely >> belonged to BIOS. How is acpi(4) driver expected to help? >> > i dont know... maybe the power down procedure offers some flag > (like "power down, but honor the BIOS settings about wake-up time" and > "power down and ignore BIOS settings about wake-up time")? > That LAN wake-up packet worked fine (WOL?) if FreeBSD powered the box down... > > Maybe i used a different/buggy BIOS when I found the problem? > Maybe Linux couldnt do it, too...? > > I dont use that box (mainboard: ECS K7VVM+ or so)/FreeBSD anymore, > but it should be easy for u to test it on contemporary hardware... Well, I am not aware of any OS assistance or control over this. If hardware and BIOS support this feature and it is properly configured, then power-on happens entirely in hardware and for OS it looks just like a normal boot. BTW, an interesting page: http://www.mythtv.org/wiki/ACPI_Wakeup It mentions that BIOS would disable wake up if hardware clock is modified later. We do that. -- Andriy Gapon _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-acpi To unsubscribe, send any mail to "[email protected]"
