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From:   Aditya Garg <gargaditya08@live.com>
To:     "matthew.garrett@nebula.com" <matthew.garrett@nebula.com>,
        "jk@ozlabs.org" <jk@ozlabs.org>,
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CC:     Orlando Chamberlain <redecorating@protonmail.com>
Subject: [REGRESSION] Failure to write the NVRAM variables starting from
 kernel 6.0 on T2 Macs
Thread-Topic: [REGRESSION] Failure to write the NVRAM variables starting from
 kernel 6.0 on T2 Macs
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Date:   Wed, 19 Oct 2022 19:26:04 +0000
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Starting from linux kernel 6.0, the ability to write to the NVRAM has been =
lost on T2 Macs.

This has been observed especially during installation of boot loaders like =
GRUB, causing errors as shown :-

Installing for x86_64-efi platform.
grub-install: warning: Cannot set EFI variable Boot0001.
grub-install: warning: efivarfs_set_variable: writing to fd 7 failed: Inval=
id argument.
grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: =
Invalid argument.
grub-install: error: failed to register the EFI boot entry: Invalid argumen=
t.

I couldn't find any relevant error in journalctl though, but I still am pos=
ting my journalctl just in case I missed any error.

https://gist.github.com/AdityaGarg8/da7a9a2c891f5b2f68f71dc0d0e77f9a

Regards
Aditya=