From: Oliver Neukum <oliver@neukum.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "Ville Syrjälä" <syrjala@sci.fi>,
daniel.ritz@gmx.ch, "Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"Jiri Kosina" <jkosina@suse.cz>,
linux-usb@vger.kernel.org, linux-input@vger.kernel.org
Subject: Re: [rft]power management for usbtouch
Date: Sun, 29 Jun 2008 00:47:55 +0200 [thread overview]
Message-ID: <200806290047.56736.oliver@neukum.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0806281230510.23173-100000@netrider.rowland.org>
Am Samstag 28 Juni 2008 18:33:30 schrieb Alan Stern:
> On Sat, 28 Jun 2008, Oliver Neukum wrote:
>
> > In hindsight adding that interface at all was an error. I was in favor
> > of it and that was a mistake. Maybe it should be removed.
> > Complicating good drivers for its sake I therefore consider an error.
> > Possibly we should consider a forcible suspension a form of disconnection.
>
> Are you suggesting that the "off" value in /sys/.../power/level
> shouldn't be allowed? I don't see it that way -- there's no other
> mechanism for userspace to force a USB device into the low-power state.
Unfortunately.
> Forcing a disconnection during suspend might be a good idea. But if
> you do, is there any reason to consider manual suspension different
> from system sleep?
During system sleep user space is asleep and cannot make demands
on drivers. If you force a device to sleep, the driver cannot work. Therefore
it should not be bound to such a device. It's cleaner to disconnect.
Regards
Oliver
next prev parent reply other threads:[~2008-06-28 22:47 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-26 13:57 [rft]power management for usbtouch Oliver Neukum
2008-06-26 14:45 ` Ville Syrjälä
[not found] ` <20080626144545.GF22310-ORSVBvAovxo@public.gmane.org>
2008-06-26 14:56 ` Oliver Neukum
[not found] ` <200806261656.06457.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2008-06-27 8:50 ` Oliver Neukum
2008-06-27 13:17 ` Ville Syrjälä
2008-06-27 16:10 ` Ville Syrjälä
[not found] ` <20080627161036.GE19430-ORSVBvAovxo@public.gmane.org>
2008-06-27 19:07 ` Oliver Neukum
2008-06-27 20:20 ` Ville Syrjälä
[not found] ` <20080627202027.GG19430-ORSVBvAovxo@public.gmane.org>
2008-06-27 20:41 ` Oliver Neukum
[not found] ` <200806272241.22513.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2008-06-27 20:51 ` Ville Syrjälä
[not found] ` <20080627205147.GI19430-ORSVBvAovxo@public.gmane.org>
2008-06-27 20:57 ` Oliver Neukum
2008-06-27 21:28 ` Ville Syrjälä
2008-06-28 10:52 ` Oliver Neukum
2008-06-28 11:22 ` Ville Syrjälä
[not found] ` <20080628112258.GK19430-ORSVBvAovxo@public.gmane.org>
2008-06-28 12:53 ` Oliver Neukum
2008-06-28 16:33 ` Alan Stern
2008-06-28 22:47 ` Oliver Neukum [this message]
[not found] ` <200806290047.56736.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2008-06-30 15:29 ` Dmitry Torokhov
2008-06-30 15:47 ` Alan Stern
2008-06-30 16:02 ` Dmitry Torokhov
[not found] ` <20080630115953.ZZRA012-NG0XCrj25/nJrYCpivWRnl5pS2h4L8biXqFh9Ls21Oc@public.gmane.org>
2008-06-30 16:16 ` Alan Stern
2008-06-30 16:30 ` Dmitry Torokhov
2008-06-30 16:58 ` Alan Stern
2008-06-30 22:46 ` Oliver Neukum
[not found] ` <200807010046.34219.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2008-07-01 7:59 ` Jiri Kosina
2008-07-01 9:08 ` Oliver Neukum
2008-07-01 12:56 ` Dmitry Torokhov
2008-07-01 15:00 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0807011058340.2780-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2008-07-01 16:02 ` Dmitry Torokhov
[not found] ` <20080701085504.ZZRA012-NG0XCrj25/nJrYCpivWRnl5pS2h4L8biXqFh9Ls21Oc@public.gmane.org>
2008-07-01 16:57 ` Oliver Neukum
[not found] ` <200807011857.02259.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2008-07-01 17:39 ` Ville Syrjälä
2008-07-01 19:03 ` Alan Stern
2008-06-27 13:17 ` Ville Syrjälä
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