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SubjectRe: 2.4.22 USB problem (uhci)
>>>>> "Greg" == Greg KH <> 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.

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