the system has not been installed. Currently I'm trying to use
ubuntu-18.04.1-desktop-amd64.iso:
release the image to a FAT32 partition on USBflash drive, then modify BIOS
(UEFI) to boot from USB flash drive. However, computer freezes and black
screen when saving changes made on BIOS.
I can help you test the issue if needed.
Have read “Subject: efi/cainloader: truncate overlong relocation section” ,
thanks!
Mathieu Trudel-Lapierre 于2018年10月3日周三 下午10:41写道：
> How is this system installed?
>
> Shim 15 works quite well here to chainload Windows or boot to grub in
> cosmic, and isn't yet available to users in other releases of Ubuntu.
>
> ** Changed in: grub2 (Ubuntu)
>Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1783480
>
> Title:
> Boot stuck
>
> Status in grub2 package in Ubuntu:
> Incomplete
>
> Bug description:
> Question 1:
> Configuration instructions
> CPU: Intel i7 7700
> Graphics card: CPU integration
> Motherboard: ROG STRIX Z270E GAMING
> BIOS starts UEFI and secure boot (64Bit UEFI)
>
> Shim15->Ubuntu Grub2(applied/ubuntu/bionic-devel)
>
> Booting to Ubuntu Grub2 stuck, the screen is always black, you can only
> restart the computer by pressing the restart button.
> If you turn off the safe boot, everything works fine.
> I can rule out that it is caused by shim15, because after I deleted the
> grub.efi file, shim15 prompts that grub.efi cannot be found.
> Finally, I deleted the grub.cfg file and it still stuck.
> The above problem is normal if you use the Fedora29 Grub2 code (
> https://github.com/rhboot/grub2/tree/fedora-29).
>
> Question 2:
> The test platform is VMware14, and the BIOS has enabled UEFI and Secure
> Boot (32Bit UEFI).
> 32Bit UEFI will not have the above problem, but it will be stuck when
> bootloader is used to boot the bootmgfw.efi file of Windows system.
> This is the case with Ubuntu Grub2 (applied/ubuntu/bionic-devel) and
> Fedora29 Grub2 (https://github.com/rhboot/grub2/tree/fedora-29).
> Debian Grub2's 32Bit Grub2 (
> https://salsa.debian.org/grub-team/grub/tree/debian/2.02+dfsg1-4) has no
> problems, but he will have the stuck condition described in question 1.
>
> I am not very familiar with the grub2 code, but I can assist with the
> test.
>
> Grub.cfg file
>
> insmod part_gpt
> insmod part_msdos
> insmod png
> insmod all_video
> insmod gfxterm
>
> loadfont $prefix/font.pf2
>
> set timeout=3
> set default=1
> set gfxmode=auto
> set gfxpayload=1024x768
> terminal_output gfxterm
> set theme=/style.txt
>
> menuentry 'Linux' --hotkey=f3 {
> if cpuid -l; then
> linux /bzImage loglevel=3
> else
> linux /bzImage_x86 loglevel=3
> fi
> initrd /initramfs
> }
>
> menuentry 'System' --hotkey=enter {
> chainloader (${root})/EFI/Microsoft/Boot/bootmgfwLoadOs.efi
> }
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1783480/+subscriptions
>
--
*Hao Binnan*
*Isoo (Qinhuangdao) software development Co., Ltd. (China)*
http://www.eassos.com
PGP Public Key: 4096R/9EF21740 / 9678 1E8C B21E 1E60 3997 811D F83B B359
9EF2 1740
haobinnan
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https://bugs.launchpad.net/bugs/1783480
Title:
Boot stuck
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1783480/+subscriptions
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