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Lordadmiral Drake

Acer Aspire 7750G - Need a little help

8 posts in this topic

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Hardware config is in signature


I've now hackbooked my new Laptop with OS X 10.8.2

The most important stuff is already working, but I need some help polishing my installation


What works:

AMD Radeon HD6850M with QE/CI

Sound - ALC269VB with VoodooHDA

USB 3.0 Controller


Battery charge level


What doesn't work:

VoodooHDA detects my sound chip. But at startup it only detects the HDMI audio output, internal microphone and microphone jack.

If I do:

sudo kextunload VoodooHDA.kext

sudo kextutil VoodooHDA.kext

in terminal I detects my internal speakers, but HDMI audio is gone.

Headphone jack isn't detected in either case.


Despite having patched my DSDT I still need NullCPUPowerManagement

After some time of doing nothing the system freezes and I need to hard-reset

No trackpad scrolling


Any help is much anticipated :)

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I used this tutorial: http://www.root86.or...rial-(IntelPCs)

It's in german, but from your username I assume that you speak german


VoodooHDA is known for causing KP and system freezes. Remove all related files from your system to proof, if VoodooHDA causes your freezes. Then you have to search for a patched AppleHDA.kext for Alc269/271. For native PM a DSDT is not relevant. You need a patched AppleIntelCPUPowerMangement.kext and may be a roolback of AppleACPIPlatform.kext. Install the attached ACPM.kext and generate with the script from Revogirl in my attachment an own SSDT.aml. After a reboot remove NullCPUPowermanagement.kext and if it is on your system sleepenabler.kext, delete kextcache and boot with option -v -f. Maybe you have to generate C and P-States with chameleon.


Have fun.


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