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Thread: G-4 dual 450 restart after powerfailure

  1. #1
    Join Date
    Sep 2000
    Location
    Switzerland
    Posts
    55

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    Hi there
    G-4 dual 450,FWB 4.5.2 drivers, OS 9.2.2 :
    The Energy Saver is set to NOT start after a powerfailure,
    but the dual does restart.
    I've zapped Pram, reset PMU, and resetting PMU didn't
    even reset the Pram.
    Any clue somebody ?
    Thanks a lot and best regards
    Klaus

  2. #2
    Join Date
    Aug 2001
    Location
    Grangeville, ID USA
    Posts
    9,119

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    Klaus,

    ?The proper way to do resets is with an Open Firmware reset, not a PMU reset. The PMU is a microprocessor and resetting it has risks. There are no risks to resetting OF and it will get the NVRAM also.

    ?Hold the Command+Option+O+F keys during startup. This will put you in the Open Firmware Interface. At the end of any text you will get a '>' prompt. At that prompt type:

    >reset-nvram
    Hit return
    >set-defaults
    Hit return
    >reset-all
    Hit Return and your computer will resume normal startup.

    ?In new world Macs resetting PRAM does not lose any setting like the old CUDA button did except that startup disk goes to the default Bus0 Drive0 Partition1. If your startup volume is still on the factory drive then even that won't get lost. Apple was responding to customer complaints that they had to reset memory, clock etc after any PRAM reset.

    ?Good luck,

    Rick

  3. #3
    Join Date
    Sep 2000
    Location
    Switzerland
    Posts
    55

    Default

    Thanks Rick, I'll post back
    Best regards

    Klaus

  4. #4
    Join Date
    Sep 2000
    Location
    Switzerland
    Posts
    55

    Default

    Ricks, I've reset the dual via OF, this reset the clock...
    All restart behaviour stays the same.
    I've continued to search for a reason, and found that if
    the attached Midiinterface, a Motu MTP AV USB, also has a
    power off condition, restart occurs even if not set to.
    If I pull the powerplug off the dual, but the USB Midiinterface still
    has power, restart is avoided.
    Must be another Apple / USB thing ?
    Thanks for help and best regards

    Klaus

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