Messages in this thread | | | Date | Mon, 29 Jun 2015 13:16:51 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [PATCH][RFC] usbhid: enable autosuspend for internal devices |
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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
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