On Wed, 2 Jun 2010 10:50:39 +0200 Florian Mickler <florian@xxxxxxxxxxx> wrote: > On Wed, 2 Jun 2010 18:06:14 +1000 > Neil Brown <neilb@xxxxxxx> wrote: > > > I cannot imagine why it would take multiple seconds to scan a keypad. > > Can you explain that? > > > > Do you mean while keys are held pressed? Maybe you don't get a wake-up event > > on key-release? In that case your user-space daemon could block suspend > > while there are any pressed keys.... confused. > > IIRC, the device sends interrupts only for first key-down and > last key-up. > To detect simultaneous key-presses you must actively scan it after the > first key-down. That makes sense - thanks. Presumably the first key-press gets to user-space promptly, so the user-space suspend daemon can be told not to suspend until the last key-up. Thanks, NeilBrown _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
