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Macbook Pro: Firewire Troubleshooting
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JES
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#1
7th March 2011
Old 7th March 2011
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Macbook Pro: Firewire Troubleshooting

Hi All,

My Macbook pro Firewire port is intermittent and it's driving me nuts. It works when I first plug things in and then stops. I'm eventually going to buy a new computer but I'd really like to wait for a few months if there's a fix for this. It's actually been going on for a long time but appears to be getting worse.

Examples: I plug in an external firewire drive for Time Machine. It usually completes the backup but later will drop the drive, and if the system goes to sleep, it will wake up and cycle endlessly looking for the drive (which I eventually have to unplug).

I monitor through an Apogee Duet. In Ableton Live, it'll run for awhile, but then if I stop a song in the middle and start playing again, it will get all glitchy. I can unplug the Duet, plug it back in, then reset my audio preferences and it will work fine again for a few minutes. Also, Ableton playback starts glitching at lower processor levels than if I use the built-in audio.

Things I've tried:

rebooting
zapping PRAM
switching out the cable on the Duet
never plugging more than one device at a time into the firewire port.

2007 MBP, 17", C2D 2.4, OSX 10.6.6. Any suggestions? Anyone have a similar experience? Is there any kind of definitive test you can do on a firewire port?

Thanks for reading!
#2
7th March 2011
Old 7th March 2011
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JES
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8th March 2011
Old 8th March 2011
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Thanks. I'll try this -- any other suggestions?
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8th March 2011
Old 8th March 2011
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Is the drive bus powered or externally powered?

If a device draws too much current i believe the computer will shut down the port.

A.
JES
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8th March 2011
Old 8th March 2011
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Thanks. I was wondering if it was somehow underpowered or a sensor was off.
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11th March 2011
Old 11th March 2011
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Firewire Hub

Did you try the device self-powered, or through a hub? Did this resolve the issue?
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11th March 2011
Old 11th March 2011
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the same problem here:(

macbook pro i7 eaely 2010 and duet and logic.

but maybe its this underpowered thing. i currently drive duet and external lacie disc only with bus-power ...

must check with an powered hub.

michael
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11th March 2011
Old 11th March 2011
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Quote:
Originally Posted by rici View Post
the same problem here:(

macbook pro i7 eaely 2010 and duet and logic.

but maybe its this underpowered thing. i currently drive duet and external lacie disc only with bus-power ...

must check with an powered hub.

michael
Yes: IOGear makes decent FW hubs. Or if your external drive is AC powered many have two ports so you can loop through to your interface. This works fine on LaCie drives. You might need a FW400 to 800 cable.

I think the FW bus from the laptop tops out at 15 watts. Or rather that used to be the case.

A.
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11th March 2011
Old 11th March 2011
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Your firewire port may be dead or dying. Take it to an Apple Store. They may be able to fix it if you are still in warranty.
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