Patching LAPTOP DSDT/SSDTs
The process of patching involves several steps:
- extracting native files
- disassembling the native files
- analysing and filtering the native files
- patching
- saving (compiling) and installing
Extracting with Clover F4 is recommended, due to ease of extraction, and due to ease of comparison between ACPI/origin and ACPI/patched (for troubleshooting).
At the main Clover bootloader screen, you can press F4 and Clover will dump the native ACPI files to EFI/Clover/ACPI/origin. You can then access them after you boot OS X to disassemble them and patch. Note that some BIOS implementations reverse the function of Fn+F4 with F4, so when in doubt, press both Fn+F4 and F4. There is no feedback during or after the dump, just a slight delay as the files are written. The delay is more noticeable if they are being written to USB, as would be the case when booting from a Clover USB.
Sometimes, Clover F4 will write duplicate SSDTs. These duplicates will cause problems during disassembly. If you run into issues (duplicate definitions) during disassembly, you will need to analyse all SSDTs to eliminate the files which are duplicate. It is easy to see which are duplicates by looking at the file sizes. Files with equal size are likely duplicates.
You can see file sizes in bytes of all SSDTs in Terminal:
ls -l SSDT*.aml
You will need a recent build of iasl to disassemble them properly. There is an appropriate version available here: https://bitbucket.org/RehabMan/acpica/downloads. It is a good idea to copy the iasl binary to your path (eg. /usr/bin), so it is easily accessed from Terminal.
For example, if you downloaded it to ~/Downloads/iasl.zip, you can extract and copy it in Terminal:
Code (Text):
cd ~/Downloads
unzip iasl.zip
sudo cp iasl /usr/bin
- extracting native files
- disassembling the native files
- analysing and filtering the native files
- patching
- saving (compiling) and installing
Extracting native ACPI files
Extracting with Clover F4Extracting with Clover F4 is recommended, due to ease of extraction, and due to ease of comparison between ACPI/origin and ACPI/patched (for troubleshooting).
At the main Clover bootloader screen, you can press F4 and Clover will dump the native ACPI files to EFI/Clover/ACPI/origin. You can then access them after you boot OS X to disassemble them and patch. Note that some BIOS implementations reverse the function of Fn+F4 with F4, so when in doubt, press both Fn+F4 and F4. There is no feedback during or after the dump, just a slight delay as the files are written. The delay is more noticeable if they are being written to USB, as would be the case when booting from a Clover USB.
Sometimes, Clover F4 will write duplicate SSDTs. These duplicates will cause problems during disassembly. If you run into issues (duplicate definitions) during disassembly, you will need to analyse all SSDTs to eliminate the files which are duplicate. It is easy to see which are duplicates by looking at the file sizes. Files with equal size are likely duplicates.
You can see file sizes in bytes of all SSDTs in Terminal:
ls -l SSDT*.aml
Preparing tools for disassembly
To properly disassemble your extracted files, you need the iasl compiler, which is run from Terminal.You will need a recent build of iasl to disassemble them properly. There is an appropriate version available here: https://bitbucket.org/RehabMan/acpica/downloads. It is a good idea to copy the iasl binary to your path (eg. /usr/bin), so it is easily accessed from Terminal.
For example, if you downloaded it to ~/Downloads/iasl.zip, you can extract and copy it in Terminal:
Code (Text):
cd ~/Downloads
unzip iasl.zip
sudo cp iasl /usr/bin
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