On Thu, 5 May 2005, Stefan Rompf wrote:

> you must have either a good memory or a good email backlog ;-)

Not as good as I would like!  :-(

> I've tested with full speed and low speed devices, connected directly or to a 
> self powered USB 1.1 hub. On resume I get a
> 
> check_and_reset_hc: legsup = 0x2000
> Performing full reset
> 
> for all three UHCI host controllers. Afterwards, EHCI restarts, hands over 
> ports, the devices are (re)detected by UHCI and work fine. As far as I 
> remember our conversation, that is what I need to expect due to the BIOS 
> completely powering down the USB subsystem.

Could be.  There's no easy way to tell why the value is 0x2000 rather than 
what it would be with no interference.

> The fact that devices vanish for a short time may irritate upper layers like 
> USB storage, but OTOH I can even connect and disconnect stuff during S3 
> successfully now.
> 
> Nice work!

Thanks -- I'm glad to see that all those changes are actually doing some 
good.

Alan Stern



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