linux-kernel - Re: USB: on suspend to ram/disk all usb devices are replugged

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Message-ID: <460BE34D.7050603@rtr.ca>
Date:	Thu, 29 Mar 2007 12:03:25 -0400
From:	Mark Lord <lkml@....ca>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Maxim Levitsky <maximlevitsky@...il.com>,
	linux-kernel@...r.kernel.org, gregkh@...e.de,
	Andrew Morton <akpm@...l.org>
Subject: Re: USB: on suspend to ram/disk all usb devices are replugged

Alan Stern wrote:
> On Thu, 29 Mar 2007, Mark Lord wrote:
>
>> Mmm.. this sounds really bad -- I wonder what happens if the rootfs is on USB ?
> 
> The system crashes as soon as it resumes.  As you might expect.
> 
>> With older kernels, things just "worked" this way.  Has it now been broken ??
> 
> No; it has never worked.  Your memory of how older kernels behaved is wrong.

Ah. Perhaps my Kubuntu system was using a FreeBSD kernel under the hood back then.
It really did work for me, back about 2 years ago when last attempted.
But then suspend/resume (RAM) has always worked here on every notebook
I've ever used -- apparently not the norm for others.  I just expect more.

> P.S.: Help is on the way.  I will soon submit a patch to help improve the situation.

That would be very good to see.

-ml
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