Haky

Ok, I've got an update: it's fixed!! I've asked on the original leafpad bug page (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147?comments=all) and the people there have been incredibly quick to help me for anyone experiencing the same issue as me, read the comments from #617 to #622, the procedure on how to boot unsigned kernels is described there. Thank you to everyone who helped me here too, I've learned a ton about uefi and bootloaders I'm so glad it's fixed!

Isn't there some older version of GRUB2 available that could be able to boot unsigned kernels? I've searched around and found this page: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1798384 but I was not able to reproduce the same bug.

I've reseted the cmos, and it seems that either did nothing, or secure boot is set "Enabled" on default

The issue is fixed in the newer version, but my bios is already corrupted, and the newer versions won't fix that. The kernel I am trying to boot is made specifically to repair the issue I'm having. Is there any way for me or some third party to sign the kernel so I could boot from it? I'm not familiar with chroot at all, so I don't know if that would help or not.

I followed these steps: But got stuck at the 5th step, because of the signature problem.

Oh, I forgot to mention, I installed the Ubuntu on another computer, and moved it, so maybe that's why I can boot from it? I have no idea.

I installed it in the 4.18 proper (it is from a USB disk, but it is a full instalation)

Hi, the bug that caused this as well as the symptoms are described here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147 There is no error when trying to save bios settings, but they just don't save. Clearing CMOS would not help, and booting is sort-of fine, I can boot using the minimal grub thingy or using the "BOOT MENU" option when starting the laptop and selecting Windows Boot Manager. I dont have any important data on the laptop, but wiping the drive is not a very smart thing to do in this situation, becase then it might be completely bricked, because I might not be able to boot. I want to repair the bios so that the machine is fully working without any issues. I am very, very close to solving the problem, I just need to boot using the modified repair kernel, and that should most likely do it, the only problem is that I had secure boot enabled, and I can't change it now, because of the corruption.

I've attached pictures of how I boot from a USB into ubuntu (it's a full install ubuntu USB, not a live one, but I can boot a live USB too). Sorry for the craptastic quality, but I could not screenshot. I've also attached a screenshot of that efi-readvar command output. It did not seem to throw any errors. However, when I tried to sign the kernel image using this guide: https://blog.ubuntu.com/2017/08/11/how-to-sign-things-for-secure-boot I could not do it, it just spat some EFI errors at me. It was two weeks ago, so I dont have any screenshots of it, but if it'd help, I can try to follow it again so that you can see what it does. First picture shows how I boot from the usb drive. Second, third and fourth are me trying to boot the linux kernel I need. Fifth one is on the 4.18 kernel, showing the output of the command you wanted to see. Thank you for any help

The bios is corrupted in two ways: 1. I can't save any settings in the bios, so I'm stuck with what I had back when it got corrupted. 2. The EFI partition or something (sorry, I'm not really familiar with it) got corrupted, so basically I can't write into it or do anything with it. That's where my Grub2 was, and it got corrupted too, so I was stuck with the Minimal Bash-like editing thingy, but I figured out how to boot from that (page 3 of Google basically). I can now get into ubuntu from a live USB and I also managed to install it into the laptop, and I get into Grub2 from a normal partition, not EFI. I don't know if i wrote that atlease somewhat sensibly, so i'll try to list the main things I can and cannot do: I can: -Boot into normal ubuntu instalation -Boot into grub2 -Boot into live usb ubuntu -Boot into Windows10 I can't: -Change setup/bios settings, so I'm stuck with secure boot -Boot ubuntu with the kernel I need for the repair because it is not signed -Do stuff with EFI thingy I need to either sign the kernel, or somehow boot with it without signing it. I'm not very experienced with linux, if there's some logs or other info that would be helpful, please don't hesitate to ask! Thanks for the help and hope this clears things out

Hi! My laptop's bios became corrupted about a year ago because of a bad ubuntu kernel. I'll spare you the details, but I almost solved it (it can be solved using this guide: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147). The problem is, that I can't run the linux kernel that is supposed to fix my bios, because it is not signed, and I can't turn secure boot off, because my bios is corrupted, so the only way I'm ever going to fix this is probably to sign it somehow. I've googled around, and found a guide that looked promising, but when it came to the signing, I could not do it, because the signing utility could not access my EFI something something. So basically, I can't do the local sign. Is there some way around this? Thanks!