linux-kernel - Re: [PATCH] Revert "V4L/DVB: uvc: Enable USB autosuspend by default on uvcvideo"

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Message-ID: <CAA7C2qhpUnqCC8ikQ39Sn26jD3iphjOhL-0t09vBdKskvuz9MA@mail.gmail.com>
Date:	Tue, 24 Sep 2013 08:58:40 -0700
From:	VDR User <user.vdr@...il.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Adam Lee <adam.lee@...onical.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg@...hat.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	"open list:USB VIDEO CLASS" <linux-media@...r.kernel.org>
Subject: Re: [PATCH] Revert "V4L/DVB: uvc: Enable USB autosuspend by default
 on uvcvideo"

On Tue, Sep 24, 2013 at 4:34 AM, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
> I've discussed this issue during LPC last week, and I still believe we should
> enable auto-suspend. The feature really saves power, without it my C910
> Logitech webcam gets hot even when unused.
>
> If we disable auto-suspend by default and enable it from userspace only a
> handful of devices will get auto-suspended. Unless we can get distros to
> automatically test auto-suspend on unknown webcam models and report the
> results to update a central data base (which would grow much bigger than a
> quirks list in the driver in my opinion), disabling auto-suspend would be a
> serious regression.

Setting defaults which knowingly cause problems is a horrible idea.
Just because it works for you and your setup is no justification to
force it upon everyone. This is certainly a feature that, if wanted,
can be enabled by the user. I don't see any reasonable argument
against letting the user enable it if he/she wants it.

Ps. Sorry for the double-post if anyone already received this. The
first posting wasn't using plain text and was therefore rejected so
this corrects that.
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