All Questions
Tagged with secure-boot grub
13
questions
1
vote
1
answer
970
views
Odd message during boot using GRUB
I use Secure Boot, followed by GRUB2, set up to boot Debian 12 and Windows 11 at the choice of a user. Right after the user chooses Windows and hits ⏎, we see a black screen with two white lines on it ...
user1787659
1
vote
1
answer
833
views
Making a MOK-signed GRUB with extra modules
I have a Wake-on-LAN situation where I'd like GRUB to make a network request to decide "should I boot Windows?", perhaps by load_env (http,192.168.1.123)/grubenv (so I can write that file ...
- 253
0
votes
1
answer
169
views
Is it possible to "go back" to grub after booting linux
I am trying to enable secureboot so I can forget about it when switching between windows and linux through dualboot. However, grubs newer versions don't allow mods to be inserted after boot, so I need ...
- 1
0
votes
0
answers
3k
views
Debian 11 - grub: Secure boot forbids loading module from (hd1,gpt5)/grub/x86_ 64-efi/exfat.mod
When booting up, my screen flashes with a bunch of errors, reporting that some grub modules couldn't be loaded due to Secure Boot, e.g.:
Secure boot forbids loading module from (hd1,gpt5)/grub/x86_ 64-...
- 161
0
votes
0
answers
486
views
Linux usb live cd not starting due to secure boot error
Greeting to you all, I'm having the following issue.
I've received a notebook (acer Aspire 3 A315-23) and
I'm trying to install a linux distribution on the system (namely a devuan beowulf).
I created ...
- 101
1
vote
2
answers
788
views
When does Bitlocker unlock the drive?
I want to set up a Windows 10 Pro + Debian dual-boot configuration on my TPM-enabled laptop. The thing is that I want both Windows and Linux partitions to be fully encrypted by Bitlocker. I found a ...
- 23
1
vote
0
answers
860
views
Signature verification fails for secure boot kernel
I'm trying to setup secure boot with using custom keys exclusively following the guide from rodsbooks. I created and enrolled keys for db, KEK and PK and signed grub and the kernel image accordingly (...
- 111
0
votes
0
answers
370
views
Linux kernel authentication
For the problem that I am facing is actually that I am working on a project which is about checking the integrity of the kernel image "vmlinuz" that is in the hard disk!
To do so, am trying to add a ...
2
votes
1
answer
4k
views
How do I boot Windows 10 without Secure Boot (but with UEFI enabled) if it was preinstalled with Secure Boot?
I'm trying to get Windows 10 to play nice in a dual-boot setup with Antergos as the other OS, but I don't want to have to toggle Secure Boot every time I want to switch OSes, and I'd much rather not ...
3
votes
2
answers
4k
views
Why isn't grub loading in UEFI?
I'm stuck trying to get Linux to boot on my PCs. I've been trying a lot with OpenSUSE and Ubuntu on my different laptops but none of them work. Regardless how many times I run update-grub, it never ...
- 28.3k
0
votes
1
answer
1k
views
Is there a way to tell whether my EFI bootloader would accept the signature of the binary without reboot?
Assume that I have just installed a signed EFI bootloader (e.g. grub2 from Ubuntu 14.10 amd64 on a Lenovo IdeaPad U410 which can only boot in secure boot EFI or legacy mode) on a machine from within a ...
- 2,312
2
votes
1
answer
165
views
Stop Windows 8.1 from removing Grub
I've got a relatively new HP Envy machine running Windows 8.1 that I want to run Ubuntu on. Installation works great and I'm all happy until I boot back into Windows, at which point grub is removed ...
- 245
16
votes
5
answers
69k
views
How would I reinstall the grub-efi bootloader on Fedora Linux?
I recently installed Fedora 18 using EFI boot. Like the other current linux distributions, it sets up GRUB2 for me.
I have experience with re-installing the BIOS version of GRUB when things go wrong....
- 3,365