[Bug 1839317] Re: Grub fails to chainload the Windows Boot Manager on aarch64 laptops

[Giovanni]

thanks for the support.
I tried to install shim unsigned but without success.
if the secure boot is active, grub works correctly.
if inactive grub does not launch windows.
tried on   my 2 acer notebooks (Aspire E 5 and the v-371)

Il giorno lun 4 nov 2019 alle ore 21:30 Steve Langasek <
steve.langasek at canonical.com> ha scritto:

> The standard UEFI boot path for Ubuntu is always to boot via shim and
> then to grub.
>
> But we also know that the signed shim binary we currently have for arm64
> is broken on this architecture.
>
> The fixed shim is in the process of being signed and in the meantime
> this is simply an unsupported configuration.
>
> If this is reproducible when chainloading from shim to grub, then it is
> a valid bug and requires further investigation.  But there are log
> messages in the bug history suggesting that the lack of shim might be
> the cause, so for the moment I am assuming that is the case and marking
> this as invalid.
>
> Given that you've mentioned having secureboot turned off anyway, you
> could try the unsigned shim binaries from https://launchpad.net/~ubuntu-
> uefi-team/+archive/ubuntu/ppa/+packages
> <https://launchpad.net/~ubuntu-uefi-team/+archive/ubuntu/ppa/+packages>
> to see if you can reproduce the
> problem when booting shim->grub.
>
> ** Changed in: grub2 (Ubuntu)
>        Status: Confirmed => Invalid
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1839317
>
> Title:
>   Grub fails to chainload the Windows Boot Manager on aarch64 laptops
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1839317/+subscriptions
>

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https://bugs.launchpad.net/bugs/1839317

Title:
  Grub fails to chainload the Windows Boot Manager on aarch64 laptops

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  After an update to 2.04 Grub fails to chainload into Windows.

  When selecting the menu item to boot into the Windows Boot Manager,
  the menu flashes and returns.

  When trying to chainload/boot via the Grub command line, nothing
  happens and the prompt reappears.

  When using the same commands in an earlier version (on a bootable USB
  stick) Windows sparks into life.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1839317/+subscriptions