[acpi-jp 2746] Re: ACPI, USB, and the tangled web

[Michael Smith]

On Oct 17, 2003, at 10:25 AM, Nate Lawson wrote:

> The problem is USB although ACPI magnifies it.  USB devices can 
> generate
> wake events.  In my current testing of a new acpi_cpu driver, I've 
> found
> that just having the USB bus enabled in the kernel (with no devices
> attached) causes it to generate a steady stream of bm_sts sets even 
> though
> the laptop is completely idle.

This is normal; USB polls for new devices.  You'll need to quiesce the 
USB
controller somehow.

  = Mike

--
"there is no reliable algorithm for ensuring efficient memory usage, 
and none is possible" [Wilson95]