Can you make a recommendation? Is there one you trust? On 05/16/16 16:19, Greg KH wrote: > On Mon, May 16, 2016 at 03:49:55PM -0700, Brian T. McKee wrote: >> Thanks Greg. It is a powered USB hub. The supplies have 2.5 amps to >> spread across three cameras. One of the hub's ports uses laptop power, >> but I'm not using that port. >> The USB 3.0 spec (according to wikipedia) requires that each port be >> capable of delivering 900 mA, so those power supplies seem a bit low >> (needs 200mA more). But I strongly doubt the cameras are pulling 900mA >> since they also work with USB 2.0 ports which specifies a much smaller >> current. I can measure it if I play with a soldering iron, but I'd >> rather not risk damaging a camera. > USB hubs suck rocks, I would strongly recommend getting another one that > you "know" will provide enough power to your devices. I've worked > with enough different ones to know that if there is a chance the power > drain can be exceeded, it will be. > > good luck! > > greg k-h -- 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
