On St 28-09-05 12:17:33, Alan Stern wrote: > [Replying to two people at once] > > On Wed, 28 Sep 2005, Nigel Cunningham wrote: > On Wed, 28 Sep 2005, David Brownell wrote: > > > > If the image does contain USB drivers and the boot kernel > > > did not meddle with the device states, then the devices > > > will be suspended even though the image thinks they are > > > frozen. > > > > So a power off or reboot doesn't reset the USB devices? > > > Those would reset them, yes ... or more to the point, disconnect > > them. All the checkpoint/resume style PM scenarios should trigger > > disconnection for every USB device. (And in fact they do, with > > the USB PM fixes upcoming for 2.6.15 ... that seems to have been > > broken in the past few releases.) > > You need to state these things carefully. A complete power-off does > reset/disconnect USB devices. However, turning off your computer > might not do a complete power-off; it may well leave suspend current > available. If that's true, USB devices won't be disconnected. Examples, please. Thinkpad X32 certainly does not provide power on USB when turned off. Pavel -- if you have sharp zaurus hardware you don't need... you know my address
