System hangs and TWAINBridge, SystemUIServices and Activity Monitor in Lion

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System hangs and TWAINBridge, SystemUIServices and Activity Monitor in Lion

The past few days, my system has been starting to lag and hang a bit. I noticed that there are dozens of instances of TWAINBridge in the activity monitor, in fact right now there are 135 with a new one popping up about every 20 seconds. Each on eusing @ 100 MB of VM.

I also noticed SystemUIServer taking upwards of 11-12 GB of VM

I have 8 GB of physical RAM install.

Occassionally Fetch hangs as well and is taking up over 100% of the CPU ...

I've run Onyx, and cleaned/rebuilt/cleared caches/restarted a few times, but after a while things start slowing down again as the TWAINBridges continue to fire up over and over and the SystemUIServices swells to greater numbers.

Safari 5.1-OTHER, Mac OS X (10.7)

Posted on Aug 3, 2011 3:07 PM

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Answer 1

John Krop Author

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Aug 3, 2011 5:40 PM in response to John Krop

In case some one else experiences this ... it looks like it was my Canon scanner. I've unplugged it and the instances of TWAINBridge are not happening, and the SystemUIServer file has been steady at around 85 MB; and the system has not been hanging or unresponsive.

There's no Lion update for the scanner driver, so I still need to resolve part of this issue, but thought this might help some people out there.

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Answer 2

Peabo

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Aug 11, 2011 6:12 PM in response to John Krop

Exact same issue with my Canon scanner. Moving the twainBRIDGE.app to another location also fixes the issue temporarily.

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Answer 3

Sep 7, 2011 5:17 AM in response to John Krop

Thanks, John. I was experiencing the exact same issue. I have a Canon scanner (4400F) that was the culprit in pegging Lion's SystemUIServer and TWAINBridge processes. Unplugging the scanner from my USB hub brought things back to normal.

Hopefully this will be addressed in the next software update.

-Krishna

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