linux-kernel - Re: 2.6.25-rc6 hangs at resume after suspend to RAM on Mac mini Core Duo

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Message-ID: <Pine.LNX.4.44L0.0804011505050.1397-100000@netrider.rowland.org>
Date:	Tue, 1 Apr 2008 15:06:51 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Tino Keitel <tino.keitel@....de>
cc:	Pavel Machek <pavel@....cz>, <linux-usb@...r.kernel.org>,
	Soeren Sonnenburg <sonne@....de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>, Len Brown <lenb@...nel.org>
Subject: Re: 2.6.25-rc6 hangs at resume after suspend to RAM on Mac mini Core
 Duo

On Tue, 1 Apr 2008, Tino Keitel wrote:

> git-bisect revealed this:
> 
> $ git bisect good
> e82cc1288fa57857c6af8c57f3d07096d4bcd9d9 is first bad commit
> commit e82cc1288fa57857c6af8c57f3d07096d4bcd9d9
> Author: David Brownell <david-b@...bell.net>
> Date:   Fri Mar 7 13:49:42 2008 -0800
> 
>     USB: fix ehci unlink regressions

> For the linux-usb people: this commit breaks resume from suspend to RAM
> on my Mac mini Core Duo. It worked with 2.6.24, 2.6.25-rc5, and was
> broken since 2.6.25-rc6 (also with -rc7 and later). See
> http://lkml.org/lkml/2008/3/20/23 for more information.

Can you get any information out of the computer after the hang?  It 
would help to see the dmesg log (with CONFIG_USB_DEBUG enabled) and an 
Alt-SysRq-T stack dump.

Alan Stern

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