Hello,

I'm hoping someone out there might have a solution to strange issue I am having with a Toshiba L750 laptop running Lion.

I've managed to get the OS installed and the hardware working but have an issue when shutting down the machine; It will actually turn off the machine but when I try to power back on, nothing happens (the power button simply does nothing) I am forced to physically remove the battery and unplug the a/c, then replug it in order for it to actually power back on.

I've tried using OSXRestart.kext, ev0reboot.kext, and OpenHaltRestart.kext with no effect, tried removing my DSDT alltogether with no effect, tried safe mode, 32-bit mode, all with no effect. Updated BIOS with no effect.

I'm running out of ideas as to why this is happening. I'm hoping that someone out there has experience a similar issue and might know of a possible fix or work around to this problem.

I've done a number of hackintosh systems before and never ran into this type of issue. The laptop itself otherwise is running Lion quite flawlessly, so this is something I would really like to resolve. Please let me know of anything you think might fix the problem I've described.

Thanks!

Have you checked AppleLPC.kext comparability with your system? If you had not, just add yours to it or closest one. In Lion OSX appears those below:

<array>
<string>pci8086,2811</string>
<string>pci8086,2815</string>
<string>pci8086,27b9</string>
<string>pci8086,27bd</string>
<string>pci8086,2670</string>
<string>pci8086,8119</string>
<string>pci8086,2916</string>
<string>pci8086,3a18</string>
<string>pci8086,3b00</string>
<string>pci8086,3b01</string>
<string>pci8086,3b02</string>
<string>pci8086,3b09</string>
<string>pci10de,aac</string>
<string>pci10de,aae</string>
<string>pci10de,aaf</string>
<string>pci10de,d80</string>
<string>pci10de,d81</string>
<string>pci10de,d82</string>
<string>pci10de,d83</string>
</array>

So after some further testing I've found out the following:
The system will only power back on from a shutdown if the a/c power adapter is disconnected prior to shutting down or after shutting down.

For some strange reason, if the a/c unit is plugged in when the unit is shutdown, the power button won't work when you try to power the unit back on (unless you unplug the a/c adapter for about 10 seconds).

I've tried messing with various settings in the bios but nothing seems to change this behavior.

As for AppleLPC.kext, what does this do exactly and what dev/ven id do I match it to? I will research this further, thanks for the tip.

If anyone has any suggests, I'm all ears! Thanks!

Please help our toshiba p300-172. Won't turn on after battery removal, any one help?

Aka removed the battery before complete shutdown

Oh AND ITS MY MOMS SO PLEASE HURRY!

Has anyone found a solution to this? I have the same problem with a Toshiba X505 laptop running Mountain Lion.

I haven't a clue what devices to put in the AppleLPC.kext (as suggested by Extraspeed) if that is the fix.

Ok, so I added what I think is the proper device into the AppleLPC.kext and it has not solved the problem.
I added

<string>pci8086,1c49</string>

Here is my PCI list



Any help would be appreciated...