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my mobo is AsRock Dual-915gl, I can't shutdown my computer completely in OSX: the system is halt but the power is still on. what can I do?

The same problem/question for me. Is it a problem with the USB legacy support? I have this problem since i have a USB Keybord and USB Mouse

 

Have you the memory supported in system profile? I have this problem too

 

My Mobo is AsRock P4 Dual-915gl

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I'v disabled the USB legacy support, it doesn't work.

And I tried USB mouse+PS2 keyboard before:

1. kb doesn't work, I can reboot, but I can't shutdown.

2. if I choose SLEEP in OSX then wake it up by moving my mouse, then the kb works, I can neither reboot nor shutdown

 

I guess the problem has sth to do with the ACPI thing.

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I can shutdown now ,run 10.4.3, but not properlly

 

my experimet: I have left the computer on the process of

shutdown; during the 2 minutes that give you Mac Os X I have disconnected all the USB's of the computer and the process of shutdown has been the correct one, without problems or blue screen.

I have no idea of the reason, but it is very straign

Have anyone any Solution?

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It's the platform and the not very polished support of same. ACPI has a bunch of ways BIOS can make it so that things wake the system, from an ethernet signal to the USB port. Heck, I can even program my BIOS to make the system power up if I move the USB mouse LEFT! Yeah, great invention! ^_^

 

I can shutdown, but not restart.

 

I learned that if you are restarting and are just looking at a blue screen with that little twizzling "O" like pattern, that's it waiting for the reset hardware to kick in. You're safe to press the system RESET at that stage.

 

I thought all ATA power supplies were shut off using the same I/O sequence, but I guess this too is a motherboard driver kind of issue, and I'm guessing OS X isn't very diverse.

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I have the AsrockP4Dual MB too, I hade this problem since I installed OSX10.4.3. I made some changes in the BIOS like dissable legacy USB and used PS2 mouse&keyboard, the problem was gone eccept som times when I hade mine USB web camera was connected it couldent power down. Then I installed OSX10.4.4 in an additional partion on my second HD, evrything worked as I expected, but the powerdown problem came back again, this time it refuse to shutdown totaly dispite I dont any USB devices connected. I belive this is a kernel-ACPI issue hope that XXX will fix it in next release.

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Yes! OSX10.4.5 fixet the shuttdown problem. One thing imazing is that you have to copy over the AppleACPIPlatform.kext from 10.4.4 inorder to funktion. Considering that 10.4.5 using the same kernel, it is very odd that the problem will be fixet this way. I beleve that there must be something else that been fixed too.

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