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From: Mark Lord <lkml@rtr.ca>
To: Joshua Kwan <joshk@triplehelix.org>
Cc: Alan Stern <stern@rowland.harvard.edu>,
	linux-kernel@vger.kernel.org,
	linux-usb-devel@lists.sourceforge.net
Subject: Re: [linux-usb-devel] Problems with USB setup with Linux 2.6.16
Date: Mon, 03 Apr 2006 12:12:36 -0400	[thread overview]
Message-ID: <44314974.90907@rtr.ca> (raw)
In-Reply-To: <44309821.1090600@triplehelix.org>

Joshua Kwan wrote:
> On 04/02/2006 07:09 PM, Alan Stern wrote:
>> If you were to continue looking farther down in the log, you would find
>> that ehci-hcd sees all those devices.  Those that can run at high speed
>> continue using the EHCI controller.  For those that can't, the switch is 
>> reset and they get reconnected to their UHCI controller.
> 
> That makes sense - that is indeed what happens when it DOES work (i.e.
> with 2.6.15), but the fact is that they don't come back in 2.6.16. I
> will try building ehci-hcd in and see what happens.

Around 2.6.13, I noticed that EHCI stopped working after a suspend/resume
(to/from RAM) cycle.  So I updated my suspend script to unload/reload EHCI
each time, which fixed the problem for me.  My script still does that.

Dunno if it's fixed in mainline or not.
Does unloading/reloading EHCI help you?

   rmmod ehci_hcd ; modprobe ehci_hcd

Cheers

      parent reply	other threads:[~2006-04-03 16:13 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-03  0:48 Joshua Kwan
2006-04-03  2:09 ` [linux-usb-devel] " Alan Stern
2006-04-03  3:36   ` Joshua Kwan
2006-04-03 14:36     ` Alan Stern
2006-04-03 16:12     ` Mark Lord [this message]

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