lkml.org 
[lkml]   [2015]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH][RFC] usbhid: enable autosuspend for internal devices
On Mon, 29 Jun 2015, Oliver Neukum wrote:

> > Last time we were testing this, autosuspend for USB HID devices was quite
> > a disaster.
> >
> > Do you have any idea whether udev developers tested the "autosuspend on by
> > default for USB HID devices" on reasonable set of devices?
> >
> > The culrpits that I remember from top of my head (it's been long time
> > ago):
> >
> > - the LEDs for suspended device go off. This is very confusing at least on
> > keyboards, and brings really bad user experience
>
> That is a bug. hidinput_count_leds() is supposed to prevent that.

This is a HW property and nothing kernel can do about. I am not saying it
doesn't bring the LEDs up to a proper state again once auto-resumed. But I
hate the LEDs going off a few seconds after I stop typing (i.e. once the
keyboard gets auto-suspended).

--
Jiri Kosina
SUSE Labs


\
 
 \ /
  Last update: 2015-06-29 13:41    [W:0.056 / U:1.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site