Re: Autosuspend/wakeup every 30 seconds?

Le jeudi 01 mars 2007 à 16:05 -0500, Alan Stern a écrit :
> On Thu, 1 Mar 2007, Frédéric RISS wrote:
> 
> > With 2.6.21-rc2 I get this in my logs every 30 seconds:
> > 
> > [  772.934864] usb usb4: usb auto-resume
> > [  772.934898] usb usb4: finish resume
[...]
> > [  779.134635] ehci_hcd 0000:00:1d.7: suspend root hub
> > [  779.134663] usb usb1: usb auto-suspend
> > 
> > 
> > Is this behavour normal, or should the wakeups be investigated?
> 
> If you are running a program that talks to USB devices every 30 seconds 
> then the behavior is normal.

Any easy way to find out what program this could be? AFAICT this happens
even if I'm not logged in. Is some system-wide daemon like HAL know to
poll devices like that?

Thanks,
Fred


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