No keyboard after wake only with apple wired keyboard

No keyboard after wake only with apple wired keyboard =SOLVED=

Hi guys,

I'm having an issue with my apple (wired) keyboard where it will not work after wake. I can wake the system with the keyboard but after that it's dead until I re-plug.
My older keyboard (Logitech Media) that recently got replaced by the apple keyboard works fine.
I've tried BIOS Legacy settings (ON/OFF/AUTO) and chameleon tweaks (darkwake=0 & USB Bus Fix) without result. I have also tried both v1.2.6 and v1.2.7 GenericUSBXHI kexts.
What's weird is that when the rig wakes with a keyboard stroke I don't get my login screen (stays black) until I move or tap my pen (tablet)
I'm not using DSDT and no chameleon tweaks except for timeout (same as with my ML install)

Any help appreciated since I now have to go back to my old, loud and clumsy windows keyboard.

Thanks in advance

Hi Snowy,

This method should cure your problem..


Enter your UEFI BIOS and go to;

M.I.T. > Advanced Frequency Settings > Advanced CPU Core Features > Internal CPU PLL Overvoltage

Set this to Disabled and then Save & Exit Bios and your USB devices should wake after sleep



I discovered this solutions from a blog so the credit goes to Technical Bear blogspot for this tip

Hi Robbish,

I do not have that setting.
I only have Advanced Voltage Settings - CPU PLL - Auto or any number but not disabled.

Robbish said:

Hi Snowy,

This method should cure your problem..


Enter your UEFI BIOS and go to;

M.I.T. > Advanced Frequency Settings > Advanced CPU Core Features > Internal CPU PLL Overvoltage

Set this to Disabled and then Save & Exit Bios and your USB devices should wake after sleep



I discovered this solutions from a blog so the credit goes to Technical Bear blogspot for this tip

Click to expand...

Snowy said:

Hi Robbish,

I do not have that setting.
I only have Advanced Voltage Settings - CPU PLL - Auto or any number but not disabled.

Click to expand...

as you can see from my specs, my motherboard is running the BIOS version F9 so if you definitely do not have this setting in your UEFI Bios then update to F9

if it is not a version BIOS issue then it could be because you have a Sandybridge CPU installed and the function may have been meant for Ivybridge ?

Turned out I was still running F6 BIOS so updated to F9, got the setting and changed it to disabled.
Wake works fine now so the issue is solved.
Is it the new BIOS, your fix or another setting that has been changed or added, I don't know but I'm happy I can continue using this keyboard.
Thanks a lot Robbish!