From: Jan De Luyck <lkml@kcore.org>
To: linux-kernel@vger.kernel.org
Cc: James Courtier-Dutton <James@superbug.demon.co.uk>,
Dominik Wezel <dio@qwasartech.com>
Subject: Re: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+
Date: Mon, 29 Aug 2005 07:28:06 +0200 [thread overview]
Message-ID: <200508290728.07102.lkml@kcore.org> (raw)
In-Reply-To: <431245E2.5010308@superbug.demon.co.uk>
On Monday 29 August 2005 01:16, James Courtier-Dutton wrote:
> Dominik Wezel wrote:
> > Problem
> > =======
> > When turning on the laptop and during POST and GrUB loading, all ports
> > on the hub are enabled. During the USB initialization phase, when the
> > hub is detected, shortly all ports become disabled, then turn on again
> > (uhci_hcd detects the lo-speed ports). Upon initialization of ehci_hcd
> > however, the ports are disconnected again (for good):
>
> Use uhci_hcd or ehci_hcd, but never both at the same time.
> ehci_hcd will work with all lo-speed ports, so uhci_hcd is then no needed.
This seems to be in contrast with what hotplug does automatically: it loads
both ehci_hcd and uhci_hcd here. If I don't load uhci_hcd, lo-speed devices
do not work.
Jan
--
A grammarian's life is always in tense.
next prev parent reply other threads:[~2005-08-29 5:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-27 13:43 USB EHCI Problem with Low Speed Devices on kernel 2.6.11+ Dominik Wezel
2005-08-28 23:16 ` James Courtier-Dutton
2005-08-29 5:28 ` Jan De Luyck [this message]
2005-08-29 14:39 ` Randy.Dunlap
2005-08-29 7:53 ` Oliver Neukum
[not found] <mailman.1125150481.18996.linux-kernel2news@redhat.com>
2005-08-27 17:21 ` Pete Zaitcev
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