On Sun, Oct 7, 2012 at 3:11 PM, Mikus Grinbergs <[email protected]> wrote:
> Since I don't own a cell phone, I've never tried charging from an XO. > > My external USB storage devices are all self-powered; and my other USB > devices (adapters, microscopes, keyboards, etc.) are all low-power devices. > In about four years of using XO-1.5s, I haven't ever had the XO-1.5 crash > when I dynamically plugged any USB device in. > > I experienced this a couple of years ago in SF when doing my myriad of gadget tests, Hence, the reason I bought my powered USB hub is that I (more than once) plugged in an external USB powered USB mini CD drive and the 1.5 screen went slowly all weird then white. If I remember, I was informed that anything that draws more than 500mA kinda breaks USB rules- and that would include iPhones and iPads. Using a double dongle tries to kluge it on PC's, but this doesn't have any better effect on the 1.5 - something to do with power flowing downhill. I think I was also told that it doesn't happen on the XO 1 because of the presence of some diode or sumpin that keeps the USB device from draining out too fast. Since I now (like Mikus) use powered hubs for anything that needs more than 500mA of power, I have forgotten the exact explanation. I believe it was Richard who explained it to me, and basically told me to cease and desist at the risk of doing damage to the 1.5. Perhaps he can chime in again on this. Cheers, KG mikus > > ______________________________**_________________ > Devel mailing list > [email protected] > http://lists.laptop.org/**listinfo/devel<http://lists.laptop.org/listinfo/devel> >
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