Page shortcut: Guide: eGPU error 12 fix (Windows only) [started ] ◄ Mac owners please work through this thread to solve error 12 before doing a ◄ pre-compiled - load or use as reference when making your own Introduction A Windows system's DSDT table root bridge definition (ACPI PNP0A08 or PNP0A03) is usually confined to a reserved 32-bit space (under 4GB) budgetted to be large enough to host the notebook's PCIe devices. A watermark TOLUD value is then set and locked in the system firmware. Windows OS honors the root bridge definition and will allocate PCIe devices within it. MacOS ignores the root bridge constraints as too does Linux when booted with the 'pci=noCRS' parameter.

Dec 26, 2010 - The main editor windows allows the user to open a DSL file or extract the DSDT from IOReg. It has some useful resources, like syntax. Aug 11, 2016  DSDT editor can be downloaded from Mac OS: DSDTEditor_Mac.zip or also Linux and Windows: DSDTEditor_Linux_Windows.zip. Also you will need to download patch for exact model of your mainboard. DSDT patches by mainboard can be found on my lovely site (very help me this guis).

Neither of those OS require a and can allocate freely in the huge 64-bit PCIe address space. When retrofitting a eGPU, an error 12 (This device cannot find enough free resources that it can use) can occur against an eGPU in Windows' device manager making it inoperable. This can indicate there is insufficient 32-bit addressing space available to host the eGPU.

An eGPU requires a relatively large PCIe config space to allocate into. Decreasing TOLUD by reducing RAM to 2GB offers a somewhat impractical workaround. Rather, the definitive solution is below. This three step solution removes Window's 32-bit PCIe allocation constraint in order to resolve the eGPU error 12: Step 1. MacOS users: refer instead to that covers these steps titled Windows 10 - Clover DSDT memory override [UEFI Windows on Macbooks only]. Create a dsdt-modified.aml DSDT file with a 36-bit root bridge i. Download and install required tools: • extracted to c: dsdt directory.

[ has parsing errors] •, which contains the Windows ASL Compiler (asl.exe) • with Search->Goto (line) menu for fast line editting if asl or iasl compilation fails below ii. Copy WDK's ASL compiler into the c: dsdt directory. Do this by opening Command Prompt (run as administrator) and then copy-and-paste the commands below. Mkdir c: dsdt c: & cd dsdt set 64bit_OS_asl='C: Program Files (x86) Windows Kits 10 Tools x64 ACPIVerify asl.exe' set 32bit_OS_asl='C: Program Files (x86) Windows Kits 10 Tools x86 ACPIVerify asl.exe' copy /y%32bit_OS_asl% c: dsdt > nul & copy /y%64bit_OS_asl% c: dsdt >Chloe marcie. nul if not exist c: dsdt asl.exe echo ERROR: Failed to copy asl.exe to c: dsdt iii. Dump your ACPI tables to disk files ( dsdt.asl and dsdt.dat) with these commands at Command Prompt (run as administrator). The created dsdt.asl is copied here as dsdt-modified.asl which is used later on to make our required modifications. C: & cd dsdt acpidump -b -z asl /u dsdt.dat copy dsdt.asl dsdt-modified.asl iv.

You now can choose either the or (with blue dsdt-modified.dsl or magenta dsdt-modified.asl work file respectively) to generate a dsdt-modified.aml file, even trying both to maximize success. Consider: - For systems other than Lenovo, use the as their DSDT usually has an Intel creation signature. - Lenovo Thinkpad X220, T420, W530, T540P and likely other 2nd-4th gen i-core Lenovo Thinkpad systems are known to require the.

The Intel method causes a 'ACPI BIOS ERROR' on Windows bootup there. OPTION 1: Use the Intel method i. Save this >> swap ATMC with _SB_.PCI0.LPC_.EC__.ATMC() - Zero - error: unexpected ASL term type -> add 'Zero' as bracketted argument to line above it, eg: GLIS (Zero) - Arg0 - error: unexpected ASL term type -> add 'Argo0' as bracketted argument to line above it, eg: GDCK (Arg0) iii. Open c: dsdt with Windows explorer.

Compare the size of your created dsdt-modified.aml file against the memory dumped dsdt.dat. They should be within +/- 10% of each other in size. If not, repeat the above process to make sure no mistakes were made. A HP Elitebook 8440P saw the generated dsdt-modified.aml being only 15% the size of the memory dumped dsdt.dat. There this process simply did not work. For such cases use the instead.

Proceed to to load your dsdt-modified.aml file. Load your dsdt-modified.aml as a registry override or in-memory substitution OPTION 1: Load your dsdt-modified.aml as a registry override with Windows test signing mode enabled Here we load your dsdt-modified.aml as Windows registry.

Do note that an invalid dsdt-modified.aml loaded in this way can cause a BSOD on bootup. Furthermore, Windows test signing mode can be problematic for app compatibility. Download avenged sevenfold mp3. Both these issues can be avoided by using. At Command Prompt ( admin) type the following.

WDK containing asl.exe must be installed per for this to work. C: & cd dsdt asl / loadtable dsdt-modified. Enable TESTSIGNING mode for the registry override to apply. At the Command Prompt (admin) type: bcdedit - set TESTSIGNING ON If get an error like below when do this, then disable SECURE BOOT in your BIOS. An error has occurred setting the element data The value is protected by Secure Boot policy and cannot be modified or deleted iii. Reboot your system and check for 'large memory' in.