Left USB Not Fully Recognized

I seem to have issues with my left USB port in that it doesn't seem to get recognized by the system properly. The right USB port works perfectly every time.
The best example of this is when I plug in my USB cable from my iPhone to the left USB port, iPhoto will not recognize the iPhone and show it in the source column. iTunes will sync without throwing any errors on the screen. This happens every time.
Another example is when I plug in my Logitech USB optical wheel mouse in the left port. Many applications (photoshop most obviously) will not fully recognize the mouse in that I can't do multiple layer selections via the Layers palette by shift clicking a second layer.
I'm using the latest version of the Logitech Control Center software and my system is completely up to date.
Any ideas?

Sometimes a Power Management Unit (PMU) reset will fix USB problems on one side or the other. See http://docs.info.apple.com/article.html?artnum=14449

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sorry got carried away with the 5's and the little dots.
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If any update, please feel free to let us know.
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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

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For everyone having trouble with USB not being recognized......

When doing the installation, when it tells you to plug the Nano into the USB port to make sure it can find it(or whatever it says) DONT do it! Click on the box that says you want to continue installation without plugging it in. You have to download ALL of the software and all of the updates and THEN plug it in and magically it works! I have been working on this for 2 days and my 12 yr old accidentaly figured this out!

What if that doesn't solve the problem? =S
I've been having the same problem and I've tried like every possible solution that the apple support gives (totally deleting and reinstalling apple products, verified the driver, checked for viruses, disable every program that could prevent Itunes from reading my Ipod, changing usb ports, etc...) but NOTHING has solved it. It's kind of frustrating, it's been more than I week trying to solve this and nothing yet.
The only thing I can say for sure is that it isn't about the ipod, because I tried with another pc and it worked.
Please find a solution!!
Thanks

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Recently replaced a failing hard drive in my HPE-580t with a new WD Black 3 TB unit. Also, did a clean install of Win 7 Professional 64 bit.
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This question was solved.
View Solution.

I found this at the Seagate site: http://knowledge.seagate.com/articles/en_US/FAQ/218619en
Support for Disk Drives Beyond 2.2 TeraBytes (TB) and 4K Advanced Format Sectors
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UEFI BIOS desktop systems are new since 2011. Windows 7 64-bit and Vista 64-bit operating systems support booting from UEFI and GPT without the need of a non-Microsoft device driver. This is the Windows native solution for booting a 3TB drive to a single partition.
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Windows 7 and Vista support GPT 3TB single partitions
Windows 7 and Vista can only boot GPT on systems with UEFI BIOS
Windows 7 and Vista can mount a GPT non-booting data drive
Intel RST device drivers before v10.1 do not support 3TB disk drives
Windows systems with Legacy BIOS and MBR boot drives are limited to 2.2TB partitions
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Thank you, solved!

USB-Hub not working on LEFT USB port?

Hello,
I have installed Windows 7 Ultimate 64 Bit on my MacBook Pro 13" Retina (Early 2013) and it's running fine. Boot Camp version: 5.0.5033.
But I have one problem: I bought an external monitor (Dell U2414H) which has an built-in 4-Port USB 3.0 hub. So I connect the Dell monitor using a DisplayPort 1.2a cable and an USB 3.0 cable. But Windows only recognizes the monitor's built-in USB hub when I plug the USB cable into the right USB port (when I sit in front of the MacBook). Then it works without problems. But when I plug the USB cable into the left USB port of the MacBook Windows only says "USB device not recognized". But other devices like USB sticks and USB drives also work without problems on left and right USB port of the MacBook. Also when I boot in OS 10.9 Mavericks the monitor's USB hub is working on both USB ports of the MacBook. So I think it isn't a hardware failure. I also re-installed Windows, but I have still the same problem.
Do you have any idea, why only the monitor's built-in USB hub is not working in Windows on the left port of the MBP or even how I could fix it?
Is Boot Camp 5.0.5033 the most current version? I checked the box to download the latest Windows support software and also didn't find anything newer than 5.0.5033 to download, but sometimes I read about 5.1.1 - but where could I download it? AND: Doest it help?
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I think I've hit a variation on the problem you're enoucntering. I have a late-2013 13-inch Macbook Pro Retina. I've just installed Boot Camp and a copy of Windows 7 Pro. This is my first experience with Boot Camp and Windows on a Mac, so I'm in foreign teritory.
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Note that after reading your post, I did try the hub in both right and left USB ports and that made no difference in my case. I do have one more hub to try (built into my Dell monitor). I'll report back if that happens to work.

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Well now I feel a little silly..
I have tried using it on another computer and it was recognized just fine.
However, I have not tried manually mounting my WD hard drive and when I went to try to that, it worked just fine right away, without doing anything.
I then tried the thumb drive again and when I tried to mount it, it came up with this error:
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So I ran First Aid and it came up with this error:
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I have the same problem.
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My ipod nano is not being recognized in iTunes or in Windows, it only shows up as a USB and when i plug it in it says 'do not disconnect'
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copied from iPod nano 6G diagnostic mode

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yeah tried all that. the only thing that i havent tried is to delete itunes completely and restart. its the same with the ipad. i havent done a master reset. i just think it has to be something rather simple as it acknowledges that i have plugged in the ipad as it makes the noise it just come up usb not recognized. it shows up as an unknown device that doestn have any drivers
its driving me round the bend at the minute

Left USB Not Fully Recognized

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