Messages in this thread | | | Date | Fri, 21 Nov 2008 13:56:32 -0500 (EST) | From | Alan Stern <> | Subject | Re: [PATCH] USB: improve ehci_watchdog's side effect in CPU power management |
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On Fri, 21 Nov 2008, Yi Yang wrote:
> But on Asus EeePC, i saw another periodical timer usb_hcd_poll_rh_status > which fires every 256 milisecond, is this also doing with some > hardware's quirk?
That timer is associated mostly with UHCI controllers. It is not because of a hardware quirk. If the controller is suspended (for example, because no devices are attached to it) then the timer should stop.
Alan Stern
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