Re: 2.4.22 USB problem (uhci)

[Jan Rychter]

>>>>> "Greg" == Greg KH <greg@xxxxxxxxx> 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.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/