On Sat, 10 Dec 2011, gene heskett wrote: > Greetings folks; > > I have an Aluratek Libre e-book reader that laid around for about 10 > months, so the battery is obviously dead, but if plugged into a powered usb > port, it will charge in about 8 hours. > > I tried its own charger, but that appears to be dead, no output power when > plugged into a device expecting a std usb cable with the 6 pin ultra-mini-d > style, I have a card reader that lights up the whole room when a usb cable > is plugged in, 2 such cables work, but this little switch-mode wall wart > doesn't light it. > > It has been plugged into a powered hub using its own supplied USB cable for > about 2 hours now with no effect. It is completely dead. Tailing the log > does not see it being plugged in or unplugged as one would assume when the > device is turned off. However, the screen is supposed to show a charging > battery icon even then, but is not, which also tells me the log should see > it. No biscuit. > > So my question is: > > Is there any way, using usbview or lsusb -vv, to detect if a port is > consuming power to charge the battery in this scenario? In short, no. USB hub or controller hardware does not report how much current is flowing through a port. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
