From: Jan Rychter <jan@rychter.com>
To: Greg KH <greg@kroah.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.22 USB problem (uhci)
Date: Fri, 19 Sep 2003 12:17:11 -0700 [thread overview]
Message-ID: <m2d6dwr3k8.fsf@tnuctip.rychter.com> (raw)
In-Reply-To: <20030919190628.GI6624@kroah.com> (Greg KH's message of "Fri, 19 Sep 2003 12:06:28 -0700")
>>>>> "Greg" == Greg KH <greg@kroah.com> writes:
Greg> On Thu, Sep 18, 2003 at 08:10:48PM -0700, Jan Rychter wrote:
>> Upon disconnecting an USB mouse from a 2.4.22, I get
>>
>> uhci.c: efe0: host controller halted. very bad
>>
>> and subsequently, the machine keeps on spinning in ACPI C2 state,
>> never going into C3, as it should (since the mouse is the only USB
>> device).
>>
>> If afterwards I do 'rmmod uhci; modprobe uhci', then the machine
>> starts using the C3 state again.
Greg> If you use the usb-uhci driver, does it also do this?
If you mean strange messages, no, it doesn't. Using usb-uhci it just
says "USB disconnect..." and everything looks fine.
As to C-states, usb-uhci prevents Linux from *ever* entering C3, being
effectively unusable on some laptops -- so there is no way I can see the
same symptoms with it.
--J.
next prev parent reply other threads:[~2003-09-19 19:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-19 3:10 2.4.22 USB problem (uhci) Jan Rychter
2003-09-19 19:06 ` Greg KH
2003-09-19 19:17 ` Jan Rychter [this message]
2003-09-19 20:17 ` Greg KH
2003-09-19 20:29 ` Jan Rychter
2003-09-19 20:44 ` Greg KH
2003-09-19 21:14 ` Jan Rychter
2003-09-19 21:22 ` Greg KH
2003-09-19 22:30 ` Jan Rychter
2003-09-21 0:15 ` Jan Rychter
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