IPad 2 can't reliably stay connected to the left USB port on my MBP

I was upgrading my iPad 2 to iOS 8 before (succeeded) and first wanted to do a complete encrypted backup to my MacBook Pro. But when I connected it to my left USB port it wouldn't stay reliably connected. It kept on disconnecting and I couldn't backup or upgrade.
However, if I connected it to the USB 3 hub connected to my right-side USB port it worked fine and I was able to backup and upgrade and backup again.
Even after upgrading to iOS 8 I still can't connect it reliably to the left-side USB port.
However, I don't think it is the port, because I was able to do the same backup, upgrade and another backup of my iPhone 5 via the same USB port.
So I'm wondering what it might be given these data points. The iPad 2? The cable? The USB port? Maybe the USB cable is wonky but works better with the hub than the port?
I have no problem connecting other things to the left USB port, such as my printer and USB headset. And the iPad 2 and cable work just fine for charging via the adapter.
Any ideas?
Thanks,
doug

There have been a number of reported problems with the USB 3 ports on the 2012 models. Several people running Mountain Lion say that it 'fixes' the problems. Until then, see this Apple tech note - http://support.apple.com/kb/HT5172#12.
Good luck - Mountain Lion is just around the corner and will hopefully fix some of the glitches.
Clinton

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There have been a number of reported problems with the USB 3 ports on the 2012 models. Several people running Mountain Lion say that it 'fixes' the problems. Until then, see this Apple tech note - http://support.apple.com/kb/HT5172#12.
Good luck - Mountain Lion is just around the corner and will hopefully fix some of the glitches.
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Mac pro left USB port can't connect to iPad

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I just got my new Mac Pro days ago and I really love this new gift, except that when I plug in my ipad air to the left USB port, it gets connected then disconnect instantly after a few seconds, then detected... This happnes over and over. I tried different cables, it sill doesn't work. But for my iphone 4, which requires a different kind of calbe, it works fine. I think it is the problem with my Mac.
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Take it in for warranty service.
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Hello all,
I have this strange problem, yesterday i bought MIDI keyboards it's M-AUDIO Keystation Mini 32
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Hey,
i have the exact same problem! I was in the apple store and they replaced my macbook. then it just worked fine for a few days and now the problems is there again.
Do you already have a solution?

Is anyone having a problem with the new iPad (Gen. 3) not staying connected to the charger? It seems to ALWAYS get jiggled loose and no longer be charging. My iPad 1 has no issue but I can't browse Internet w/o new iPad unplugging. Horrible!

I notice that my new IPad (3rd generation) will not stay connected to the power cord at all, I'm not exagerating, if I plug it in and browse the Internet without fail it will become unplugged and I will have to push the plug back in (Ba-beep). Ive actually grown to despise that sound when you plug your iPhone or iPad in because it reminds me of how much money I spent on something that PHYSICALLY will not charge while I'm using it.
I know the problem with it holding a charge while in use, I get it, the screen is amazing and it takes a lot to run the display, however, it is unacceptable to me that I can't even keep the thing plugged in while I'm using it. I can not even leave it on my Cal King bed overnight because I will wake up in the morning to find that the plug has been jiggled loose in a corner, so it's still attached but not making a connection thus not being charged.
I love the 4GLTE from Verizon and I love the iPad, but I'm actually using my 1st generation IPad while I am at home so I can leave my new $900 iPad on a table to charge free of incident so I can use the 4G while I'm away from wifi during the day. I have been getting more upset about this because I can not even use the Griffin extended cord to charge the iPad and be far from the plug because only the original apple sync/charge cord will have a better shot at staying in. Absolutely none of my non apple cables will stay in the iPad 3 while having it in my hands.
The plug is at an angle, unlike the first iPad, not sure about the iPad 2. Please let me know if they have same issue.
If anyone else is having this problem with the Gen 3 iPad please let me know because I'm tempted to do something about it with apple and I'm hoping that I just for some reason have a bad cable receiver or something and maybe I can get a replacement and enjoy the iPad as I had expected to. There is no reason why I should be even using my first iPad and I have friends that want to buy it but I am not selling it because I'm unable to sell it because I can't handle the new iPad while it's plugged in, that is ridiculous if it's a common issue so please let me know!

Thanks for the swift reply, I have been looking online and a loose plug seems to be somewhat of an issue with many, I hope mine is actually a problem and not what others are experiencing. It's taken me this long to even reach out for the simple fact I HATE being a complainer but this is just horrible.
Do you have an iPad 3 as well? And is yours not experiencing any issues close to mine?
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how can i locate my mini ipad even when its not connected to the internet

Is it lost or stolen?
Apple (and no one else) can not assist (with serial number or iCloud) in finding a lost or stolen iPad.
Report to police along with serial number. Change all your passwords.
These links may be helpful.
How to Track and Report Stolen iPad
http://www.ipadastic.com/tutorials/how-to-track-and-report-stolen-ipad
Reporting a lost or stolen Apple product
http://support.apple.com/kb/ht2526
What to do if your iOS device is lost or stolen
http://support.apple.com/kb/HT5668
iCloud: Locate your device on a map
http://support.apple.com/kb/PH2698
iCloud: Lost Mode - Lock and Trace
http://support.apple.com/kb/PH2700
iCloud: Remotely Erase your device
http://support.apple.com/kb/PH2701
Report Stolen iPad Tips and iPad Theft Prevention
http://www.stolen-property.com/report-stolen-ipad.php
How to recover a lost or stolen iPad
http://ipadhelp.com/ipad-help/how-to-recover-a-lost-or-stolen-ipad/
How to Find a Stolen iPad
http://www.ehow.com/how_7586429_stolen-ipad.html
What NOT to do if your iPhone or iPad is lost or stolen
http://www.tomahaiku.com/what-not-to-do-if-your-iphone-or-ipad-lost-or-stolen/
Apple Product Lost or Stolen
http://sites.google.com/site/appleclubfhs/support/advice-and-articles/lost-or-st olen
Oops! iForgot My New iPad On the Plane; Now What?
http://online.wsj.com/article/SB10001424052702303459004577362194012634000.html
If you don't know your lost/stolen iPad's serial number, use the instructions below. The S/N is also on the iPad's box.
How to Find Your iPad Serial Number
http://www.ipadastic.com/tutorials/how-to-find-your-ipad-serial-number
iOS: How to find the serial number, IMEI, MEID, CDN, and ICCID number
http://support.apple.com/kb/HT4061
 Cheers, Tom

How can I tether my iPhone to my iPad to use it to connect to the internet

How can I tether my iPhone to my iPad to use it to connect to the internet

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We use one windows machine and two mbp's (post 2012) at home. We have a modem *** router from a non apple vendor that airport utility finds and connects with absolute ease. But doesn't stay connected. The signal drops often, what can I do?

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Hold down the option key on the iMac while you click on the Apple icon at the upper left corner of your screen and select System Profiler
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In the window to the right, look for any listings of your wireless network name. You may possibly see two listings for the wireless network name.
We need for you to list the information that you see for Signal / Noise. These will be negative numbers. Post back with your findings and we will continue.
In the meantime, please move any cordless phones that you have or any other electronic devices that are near the iMac as far away as possible from the iMac.
If the iMac is located in a corner or an enclosed area, give it as much room as possible since the wireless antenna is on the back of the iMac and it needs to be able to "see" the room.
Anything that you can do to minimize the number of obstructions like walls or furniture etc between the iMac and the wireless router will help the cause as well.

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hmmmmmmm..........
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IPad 2 can't reliably stay connected to the left USB port on my MBP

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