Re: Power-managing devices that are not of interest at some point in time
From: Alan Stern <stern@rowland.harvard.edu>
Date: 2014-07-19 17:59:05
Also in:
linux-pm, lkml
From: Alan Stern <stern@rowland.harvard.edu>
Date: 2014-07-19 17:59:05
Also in:
linux-pm, lkml
On Sat, 19 Jul 2014, Benson Leung wrote:
quoted
This raises an interesting question. Suppose the system gets suspended while the lid is closed. At that point, shouldn't wakeup devices be enabled, even if they were already inhibited?It's possible that this could be a policy decision, ie, whether power/wakeup is set to enabled for those devices or not. However, I'd say that there's only one policy that makes sense in that case : wakeups should be disabled while suspended. If we inhibited the device during runtime to prevent stray input events from being generated, it wouldn't make sense to allow the device to potentially generate an accidental wakeup while suspended.
That doesn't really make sense. If you're afraid of a device generating spurious wakeup events when the lid is closed, you should never enable it for wakeup. After all, one of the first things that people often do after suspending their laptop is close the lid. Alan Stern