Messages in this thread | | | Date | Thu, 01 Jun 2006 13:34:46 -0400 | From | Mark Lord <> | Subject | Re: USB devices fail unnecessarily on unpowered hubs |
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Andrew Morton wrote: > On Thu, 01 Jun 2006 02:18:20 -0700 > .. >> This is generating a lot of grief and appears to be unnecessarily >> strict. Common USB sticks with a MaxPower value just above 100mA, for >> instance, typically work fine on unpowered hubs supplying 100mA. >> >> Is a more user-friendly solution possible? Could the shortfall >> information be passed to udev, which would allow rules to be written per >> device? .. > Yes, it sounds like we're being non-real-worldly here. This change > apparently broke things. Did it actually fix anything as well?
I think a far more sensible approach would be to just ensure that the total current draw for the (unpowered) hub and all connected devices, stays below the 500mA allowed. So a 200mA device could coexist with a 100mA device on a hub which itself steals 100mA.
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