Neither of those OS require a DSDT override and can allocate freely in the huge 64-bit PCIe address space" macOS ignores the root bridge constraints as too does Linux when booted with the 'pci=noCRS' parameter. Windows OS honors the root bridge definition and will allocate PCIe devices within it. A watermark TOLUD value is then set and locked in the system firmware. "A Windows system's DSDT table root bridge definition (ACPI PNP0A08 or PNP0A03) is usually confined to a reserved 32-bit space (under 4GB) budgeted to be large enough to host the notebook's PCIe devices. I had tried to pass SETPCI commands from grub into Windows 10- no luck*Ī quote from the link above got my brain spinning I had messed around with mm commands in a UEFI shell (The shell provided in the rEFIt package) to no avail*
#Save dsdt windows how to
The problem is that QEMU resets all devices (including cirrus vga) during S3 and windows does not know how to restore it, so after resume the cirrus state is not what Window expects it to be. You may get some warnings, but if you haven’t touched anyting beside the fan speeds, just ignore them b. The trick is to tell Windows there is no need to powerdown cirrus card when entering S3 state (this is done by specifying Sx->Dx mapping in DSDT aml). The part that was frustrating to me was that many users like myself have lots of UEFI installs on their 2011 MBP and those OS's have no problem 'seeing' the HD audio controller - Enter the following in the command prompt window a. When the installation is complete there will be no notification and sound will still not work.
#Save dsdt windows install
Double-click sp33867 that you downloaded earlier and install the files according to the instructions.
#Save dsdt windows driver
Right click Microsoft UAA Bus Driver for High Definition Audio again and select Uninstall. I was given the answer from a tutorial only adjacently related -here:Įssentially what we knew was that windows didn't 'see' the correct audio devices when booted in pure efi- Wait about 5 seconds for Windows XP to disable the device. If anyone is still interested I have found the solution for audio on MBP 2011 Windows 10 UEFI installs - it has taken me 4 years to figure out.