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How do I enable disabled USB ports?
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Mac Enthusiast
Join Date: Oct 2004
Status:
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I have a usb device (headphones) that sometimes make OS X give the warning that it is drawing too much power and it is going to disable the port. I plug the usb headphones into the keyboard usually alongside my mouse and after I get the warning, I find that the headphone port on the keyboard no longer works. To fix it, I unplug and plug in the keyboard and reattach the headphones. Oddly, after the first time, I don't get the warning about the power and all my devices work as normal.
However, my dad has sometimes had the same error by plugging the headphones into the machine direct and it disabled his machine port i.e. not on a keyboard that you can unplug easily. Is there any way to enable the port again without restarting the machine? The headphones are Logitech so it's not just a rubbish weird name set of headphones.
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Mac Elite
Join Date: May 2001
Location: Cambridge UK
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Are you running a B&W G3? I have similar problems, but I solved it by plugging the high power device (in my case a wacom tablet) directly into the machine; as this hasn't worked I'm not sure what to suggest, other than using a usb hub with a separate power supply.
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Addicted to MacNN
Join Date: Mar 2002
Location: Winnipeg
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Why would you be using USB headphones?
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Because that's the most practical type of headsets with built in boom mikes.
tooki
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Mac Enthusiast
Join Date: Oct 2004
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Originally Posted by Krypton
Are you running a B&W G3? I have similar problems, but I solved it by plugging the high power device (in my case a wacom tablet) directly into the machine; as this hasn't worked I'm not sure what to suggest, other than using a usb hub with a separate power supply.
I'm using a Mac Mini but my dad is using an ancient Bondi Blue imac. The hub idea is probably best - in fact now you mention it, I think he's using a hub now. I don't think the error occurs that often - it's usually just as the headphones are being plugged in. If they're left plugged in, the errors don't happen. I was more curious as to how to get the ports functioning again in that situation because it seems a bit of a flaw that OS X can disable ports but does not enable them again automatically once the offending device is removed or easily allow users to do it.
Originally Posted by Superchicken
Why would you be using USB headphones?
Tooki's right, they are the most practical with the built-in mike. I also had to get a set like that because there isn't an audio input on the Mac Mini.
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