On Thu, May 27, 2010 at 10:37:51PM +0100, Alan Cox wrote: > On Thu, 27 May 2010 18:25:10 +0100 > Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > > How (and why) does the WoL (which may be *any* packet, not just a magic > > one) turn the screen back on? > > Well on my laptop today it works like this > > A WoL packet arrives > The CPU resumes > Depp process, chipset and laptop BIOS magic happens > The kernel gets called > The kernel lets interested people know a resume occurred No it doesn't. The kernel continues executing anything that was on the runqueue before the scheduler stopped. If you're using idle-based suspend then there's nothing on the runqueue - the application that should be scheduled because of the event is blocked on writing to the screen. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
