On Sun, 19 Apr 2020 at 13:41, Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
>
> Hi Ard,
>
> I got a bug report by email that "grub-install" was throwing errors
> on 32 bit UEFI (64 bit kernel, mixed mode) systems starting with 5.6 .
> After that I noticed that the Fedora installer also threw an error about
> it being unable to setup the bootloader (which I could luckily skip), this
> was also a 32 bit UEFI mixed-mode system.
>
> So I've been running some tests with efibootmgr from the shell. Adding
> new entries works, but removing an entry involves unlinking the EFI var
> for the old which fails, here is the relevant part from a strace run:
>
> unlink("/sys/firmware/efi/efivars/Boot0000-8be4df61-93ca-11d2-aa0d-00e098032b8c") = -1 EINVAL (Invalid argument)
>
> With kernel 5.5 the same unlink succeeds, I guess this is also the
> cause for the grub-install and Fedora 32 installer errors. At least
> the Fedora 32 install error was seen on a system which already had
> a "Fedora" efibootmgr entry, so likely the installer tried to remove
> the old entry first and that caused the failure.
>
> I've also tried removing efibootmgr entires on a 64 bit UEFI system running
> 5.6.4 and that works fine. On 32 bit UEFI mixed-mode systems the problem
> persists with 5.7-rc1.
>
> Ard, any idea where to start with pinpointing the cause of this
> regression ?
>
Can you start by trying this patch please?
https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git/commit/?h=urgent&id=9461aa3b44ac21668100067939d24a6ffa810eae
It is already in Linus's tree, but not in -rc1
