Re: Loading DSDT table using 'acpi' or some memory write command?

[Andrei Borzenkov]

29.03.2017 20:45, Nando Eva пишет:
>> How exactly do you find RSDP? On EFI RSDP should be retrieved from EFI
>> Configuration Table, which grub tries to update. Please give as much
>> details as possible.
> 
> Good point. I can get the RSDP from tools like 'ru.efi' or even with 'r-w 
> everything'.
> However, 'lsacpi' won't tell me the new RSDP address after doing a 'acpi 
> dsdt.aml'.
> 
> Is there anyway of finding it out using the grub shell, or chainloading EFI 
> shell (or chainload grubx64.efi from EFI shell and exiting in case grub's 
> chainloading is restoring the ACPI tables)?
> 

Please test attached patch. It adds printing of table addresses as well
as "lsacpi --scan" option that forces fetching RSDP from firmware.

It looks like on EFI our call to InstallConfigurationTable does not
work; after "acpi ..." "lsacpi --scan" still displays old RSDP and
tables (although grub itself would use new one).

I also have rather weird issue that after "acpi dsdt.aml" I lose
partitions (only hard disk itself is visible). This is on real hardware
(Dell Latitude E5450).

lsapi.patch
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