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Thread: Problem with USB devices not working after restart

  1. #1
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    Problem with USB devices not working after restart

    Hi guys,

    I have a strange behaviour with my USB devices connected through a HUB that is powered by the P1900.

    I have my Touchscreen and Powermate on the USB Hub, but every so often after a restart or wake from sleep the touchscreen and / or Powermate isn't working until I take the plug out and put it back in...

    Any ideas on how to get this annoying problem solved?

  2. #2
    QCar Creator Jirka Jirout's Avatar
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    I am experiencing what I believe is the same problem with the PowerMate from time to time. However, I do experience it even when the USB hub is only powered from the Mac mini. I first thought the problem was caused by a wrong cable or connector, but now I believe the problem is something (no idea what exactly) in the PowerMate driver.

    Could you check your log whether you can find something there? I can see "PowerMate device removed" message when the PowerMate stops responding and then "PowerMate device added" when I disconnect and connect it again. Strange thing is that even during the time PowerMate does not respond, it is visible in the Apple System Profiler.

  3. #3
    Constant Bitrate MacMobile's Avatar
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    I have the same problem. Here is my current config:

    Back off Mini
    ***TouchScreen
    ***USB cable to first hub

    First hub
    ***iMic
    ***USB cable to 2nd hub

    Second Hub
    ***radioSHARK
    ***PowerMate
    ***BU-353 GPS

    I have tried many configurations and for a while I had problem with readioSHARK but sometime with others. With this configuration, it is the PowerMate that fail most of the time at wake-up. I look around in google and I found that there is a known bug in Window XP with some devices after waking up from sleep. I wonder if Mac OS X does have the same problems.
    Help me keep my web site up to date.
    Mac-Mini in Passat

  4. #4
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    Bugbyte's Avatar
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    I have my Powermate attached through a non powered hub and haven't had this issue.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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    -Find out about the new iBug iPad install?
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  5. #5
    Constant Bitrate MacMobile's Avatar
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    Quote Originally Posted by Bugbyte
    I have my Powermate attached through a non powered hub and haven't had this issue.
    All my hub are powered ones, I will try to keep only the USB plugged in to see if the problem disappear.

    Thank you
    Help me keep my web site up to date.
    Mac-Mini in Passat

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