From: Marcel Holtmann <marcel@holtmann.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Oliver Neukum <oliver@neukum.org>, Pavel Machek <pavel@suse.cz>,
Stefan Seyfried <seife@suse.de>,
linux-bluetooth@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [rfc/rft]power management for btusb
Date: Wed, 20 Aug 2008 17:41:48 +0200 [thread overview]
Message-ID: <1219246908.7591.348.camel@violet.holtmann.net> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0808201132200.2806-100000@iolanthe.rowland.org>
Hi Alan,
> > finally I found the device and setting it to auto makes it actually
> > suspend. Why is this not default? The driver has to enable it anyway.
>
> If there's no driver then it would take effect right away. This causes
> problems for devices during startup -- the period of time from device
> discovery to driver binding is long enough (because there's so much
> other activity during bootup) that the device can autosuspend before
> the driver is there to prevent it.
>
> For well-behaved devices this wouldn't matter. But unfortunately there
> are lots of devices which break when they suspend. That's why
> level = auto is not the default.
is there any way to make it default if we know it works all the time?
Regards
Marcel
next prev parent reply other threads:[~2008-08-20 15:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-20 9:42 [rfc/rft]power management for btusb Oliver Neukum
2008-08-20 10:18 ` Marcel Holtmann
2008-08-20 12:05 ` Oliver Neukum
2008-08-20 12:34 ` Marcel Holtmann
2008-08-20 12:42 ` Oliver Neukum
2008-08-20 13:00 ` Marcel Holtmann
2008-08-20 13:03 ` Felipe Balbi
2008-08-20 13:05 ` Oliver Neukum
2008-08-20 13:05 ` Marcel Holtmann
2008-08-20 13:11 ` Oliver Neukum
2008-08-20 13:13 ` Marcel Holtmann
2008-08-20 13:23 ` Oliver Neukum
2008-08-20 13:24 ` Marcel Holtmann
2008-08-20 13:34 ` Oliver Neukum
2008-08-20 13:39 ` Marcel Holtmann
2008-08-20 14:00 ` Oliver Neukum
2008-08-20 15:25 ` Marcel Holtmann
2008-08-20 15:33 ` Oliver Neukum
2008-08-20 15:35 ` Alan Stern
2008-08-20 15:41 ` Marcel Holtmann [this message]
2008-08-20 15:55 ` Alan Stern
2008-08-20 16:04 ` Oliver Neukum
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