Hi. On Fri, 2005-03-11 at 16:28, David Zeuthen wrote: > Maybe I'm reading the source wrong, but isn't it the case that some > laptops using APM (my IBM thinkpad T41 with acpi=off for instance) > suspends without user space interaction when the lid is closed, thus > rendering it impossible to send the event from user space? > > One may even ask whether it's sound to assume that all architectures > will be suspended via user space? The most common way at the moment for a lid switch to activate suspending is via the userspace acpid daemon. I'd be mildly interested if you didn't have something equivalent running on your machine. Regards, Nigel > <snip> > > > . I'm *not* going to do that from kernel. But standartizing what needs > > to be ran on resume is indeed good idea, and few lines in > > Documentation/power/* are probably worth it. > > > > There's a very practical problem of getting all distributions to > actually do this. > > Another point is that user space may just use a timer and look at the > wall clock to determine when a suspend happens, but that's hardly an > elegant architecture. It does save some discussion, though, either way > I'll be quiet now and leave you guys to do real work :-) -- Nigel Cunningham Software Engineer, Canberra, Australia http://www.cyclades.com Bus: +61 (2) 6291 9554; Hme: +61 (2) 6292 8028; Mob: +61 (417) 100 574 Maintainer of Suspend2 Kernel Patches http://suspend2.net
