Messages in this thread |  | | From | "Dunlap, Randy" <> | Subject | RE: [bug] usb-uhci locks up on boot half the time | Date | Thu, 9 Nov 2000 09:06:31 -0800 |
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> From: David Ford [mailto:david@linux.com] > [snip] > > Is the external hub a externally powered hub, or self > powered hub (does > > it get it's power from a plug in the wall, or from the USB > bus)? Self > > powered hubs are notoriously flaky and have been known to > > evil things to the USB bus. > > Either. Currently bus (self) powered. This hub has worked > fine on my other > computers without any adverse affect.
Bus-powered != self-powered.
Self-powered means that it has its own power cord.
Bus-powered means that it gets its power from the USB cable.
Unlike Greg, I would have said that bus-powered hubs can be a problem -- especially when you plug too many devices into them that need lots of power. What we saw at the USB PlugFest was hubs just shutting down when we did this. :(
~Randy
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