On Mon, Feb 27, 2017 at 2:29 PM, Nando Eva <nando4...@ymail.com> wrote: > @Andrei Borzenkov, I've confirmed that any of the following do not alter the > Win10 DSDT table across numerous Macbooks and my Dell E6540. > > acpi dsdt.aml > acpi --load-only dsdt dsdt.aml > acpi -2 dsdt.aml > > Followed by: > chainloader /efi/Microsoft/Boot/bootmgfw.efi > > Clover has a DSDT override function and using it works on my Dell E6540. > However it does it by writing to the UEFI firmware volume, which for > Macbooks, has had one test instance of bricking the system. > > Any chance of a simple 'load_dsdt [file]' command that acquires the > in-memory DSDT table address, checks it's size, then overwrites it with the > file name specified if it's the same size or smaller? >
That's more or less what grub tries to do. We cannot really overwrite ACPI tables because they may be located in read-only memory, but it attempts to create EBDA and place new RSDP there and update EBDA address as well as update RSDP pointer in EFI system table. I would suggest trying to load something else (like Linux) and check whether it sees new or old table. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel