Re: Enable CONFIG_USB_SUSPEND by default or some mobile HD can'tbe unplugged safely

[Yan Li]

On Thu, Jan 01, 2009 at 12:29:51PM -0500, Alan Stern wrote:
> On Fri, 2 Jan 2009, Yan Li wrote:
> > On it's manual read "you should unplug and remove the device only when
> > the light is off."
> 
> It's not clear whether you should believe this.  The manual may have 
> overstated things.  Still, better to be safe.

Yeah, that maybe true. Better to be safe. And we can't tell users just
to ignore the warnings on the manual.

> > On Windows and Mac OS, `safely remove this device' function effectly
> > turns it into `suspend' mode, and it's light off.
> 
> Yes -- but they don't suspend the device; instead they disable its 
> upstream port.  As far as the device is concerned, there's no 
> difference.  However the Linux API doesn't include any way to disable a 
> USB port.  Maybe we should add one...

Definitely.

> >  I did a
> > quick search in LKML and haven't found specific oppose to enable USB
> > suspend by default, and Debian has started shipping a kernel with
> > it turned on since 2.6.26.
> > 
> > Perhaps we should consider turning it on by default?  Thanks!
> 
> That is indeed the next step to take.

Hope to see this happen soon.

-- 
Li, Yan
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