On Mon 2015-09-21 10:38:46, Alan Stern wrote:
> On Mon, 21 Sep 2015, Pavel Machek wrote:
>
> > > > In fact, then, what you need seems to be the feature discussed by Alan
> > > > and me some time ago allowing remote wakeup do be disabled for runtime
> > > > PM from user space as that in combination with autosuspend should
> > > > address your use case.
> > >
> > > That, plus they want the touchscreen to go into runtime suspend
> > > whenever the screen is off (was this not the main reason for the
> > > patch?).
> > >
> > > It seems to me that it should be possible to arrange for this to happen
> > > simply by making userspace close the touchscreen device when the screen
> > > is turned off. Or am I missing something?
> >
> > Well... that's not what existing userspace expects. Your X windows
> > server will not close the touchscreen.
>
> Surely that's a userspace issue, rather than a kernel problem? The X
> server does have some notion of power management and power savings; why
> not extend that notion to include touchscreens?
Well... once upon a time, it was kernel job to mask differences
between different hardware platforms.
In a way, the hardware is "buggy" -- if your mouse clicked randomly
when you were not holding it in your hand it would be buggy... and it
would be nice for kernel to fix that "bug".
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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