|New Plugable high speed 7 port USB Hub|
The first USB 7 port hub had major problems right from the start. Even though it had a 2 amp power supply and was a package deal item on Amazon along with the Raspberry Pi. It was a no name hub that would cause the keyboard to miss or repeat keys really bad. So much so, that I bought several keyboards while trying to find the problem. Finally it burned out the USB connection to the Raspberry... Not on the RPi itself . The one on the hub.
So the next one, I went with a name brand and made sure it was on the list of verified working devices for the RPi. It was the Belkin F4U040 4 port hub. I used it for a couple weeks before I started having keyboard problems again. I found that I could fix it by powering up the RPi first and then powering up the hub. I also found that it was backfeeding the Raspberry Pi. If I unplugged the RPi with the hub still plugged in, the Raspberry Pi stayed turned on! Not a good situation and could have really damaged the little computer! I notice now they have it listed under the approved USB hubs, but with a note that it backfeeds. Then it is listed TWICE under 'problem' devices! But it is still 'verified'!
Well, I have been running my 3rd USB hub for a few days now... No sign of a power