![]() ![]() ![]() ![]() You can download iasl for Windows from Intel or on Ubuntu from acpica-tools. Use iasl DSDT.aml to decompile the DSDT to DSDT.dsl. This will extract the compiled DSDT from AmiBoardInfo to DSDT.aml Run AmiBoardInfoTool -a AmiBoardInfo.efi -d DSDT.aml. If you're on Linux you will need to build it from source using CMake which also requires that you install the distorm3 development package. Make sure to use the modified BIOS image created in the previous step.ĭownload AmiBoardInfoTool. Use UEFITool to extract body from the AmiBoardInfo (GUID 9F3A0016-AE55-4288-829D-D22FD344C34) module PE32 image section to AmiBoardInfo.efi (make sure extension is. ☁ ~ sudo dmesg | grep "root bus resource" If then last one ends at fffffffff or above then DSDT modification isn't required. Run sudo dmesg | grep "root bus resource". GPUs supporting Resizable BAR will only show under Large Memory after Resizable BAR is enabled. If your Pci Bus range ends at FFFFFFFFF or above then DSDT modification isn't required. Open Device Manager, select View -> Resources by Type and expand Large Memory. See Enabling hidden 4G decoding if you cannot find the option. Make sure 4G decoding is enabled before doing the following. You can both make Windows/Linux load a patched DSDT but we will be modifying it in the UEFI firmware. If you've applied patch Replace 16GB MMIO region with complete use of physical address space (Ivy Bridge) and have problems booting Windows or get an error about insufficient resources you'll need to patch the DSDT. This page contains information about doing the workaround. Please be aware of pad file issue when modifying DSDT on ASUS motherboards. ![]() If you do not have a motherboard which requires DSDT patching you can skip to Flashing modified UEFI.īefore opening any issues about iASL errors make sure you have read the bottom of the page explaining how to fix them.Īll warnings output by iASL are safe to ignore and will not cause any issues. Systems without 4G decoding even in hidden settings, this fix will only work in Linux for them though (atleast with GPUs).X79 systems which have applied UEFIPatch Extend MMIOH limit to fix Above 4G Decoding.ASRock Haswell/Broadwell/Skylake/Kabylake ( excluding HEDT (X99/LGA2011 and X299/LGA2066)) because these often come with broken DSDT for 4G decoding.Sandy/Ivy Bridge motherboards which have applied UEFIPatch.DSDT Patching is required only on the following motherboards. ![]()
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