- #YOUVIEW BOOT FAIL INVALID SIGNATURE HOW TO#
- #YOUVIEW BOOT FAIL INVALID SIGNATURE INSTALL#
- #YOUVIEW BOOT FAIL INVALID SIGNATURE UPDATE#
- #YOUVIEW BOOT FAIL INVALID SIGNATURE WINDOWS#
If that's not the case, then you may be able to change the boot order back.
You can check your boot path with efibootmgr and verify that it's booting through Shim by default - that is, the boot loader for the first item in the boot order should be EFI\ubuntu\shim圆4.efi. Some other GRUBs, like the one used by Fedora, are stricter and will boot only signed kernels.) (The last I checked, Ubuntu's GRUB would boot unsigned kernels, but that might change in the future. Updating your GRUB configuration is unlikely to do any good, although there's a slim chance that it might if you switch GRUB from booting an unsigned to a signed version of the kernel. If this has happened, though, it will take expert TLC to recover your computer, since pre-boot malware is notoriously difficult to extricate. I don't mean to alarm you the odds of this having happened are low. There's no telling what the consequences might be if this is the case. If that's happened, then by disabling Secure Boot, you've already enabled the malware to run. There's a small chance that something malicious is happening - some piece of malware might have installed itself in your boot path.
#YOUVIEW BOOT FAIL INVALID SIGNATURE UPDATE#
(Microsoft has the ability to update most computers' Secure Boot keys, and if they've bungled that or deliberately blacklisted Ubuntu's Shim for some reason, you might see the error you've described.)
#YOUVIEW BOOT FAIL INVALID SIGNATURE WINDOWS#
Another possibility is that an unrelated Windows update has interfered with GRUB. Locate the line for Ubuntu that launches via Shim and use the -o option to change the order so that it's first, as in sudo efibootmgr -o 0009,0000,001B if the desired entry is Boot0009 and two alternatives are Boot0000 and Boot001B. If that's the case, you can change the boot order back to Ubuntu's GRUB (via Shim) with efibootmgr - type sudo efibootmgr -v to see the current boot order (on the BootOrder line) and options (the bulk of the output). This might be an innocent change that's gone badly and caused a glitch - for instance, if you're triple-booting with another Linux distribution, it might have changed the boot path to an unsigned GRUB. OTOH, it could be that something else has modified the boot path. I saw no mention of updates to either GRUB or Shim, so your boot process should not have been affected by those updates. (Some of the messages warning of such violations are pretty obtuse - they vary from one EFI to another, and in some cases from one follow-on program to another, depending on where the violation occurred.) Such a message popping up after the computer has been booting successfully, and with no changes to your boot programs or firmware settings, is a big red flag. Second, the error message indicates that your computer attempted to boot a boot loader that was not signed with an authorized Secure Boot key. (See my page on the subject for more information on CSM's problems.)
If you were booting in a pure-EFI environment, as it sounds like you were, that option will do you no good, and could come back to bite you later. I am running Ubuntu GNOME 15.10 with GNOME 3.18 on a Lenovo B590.
#YOUVIEW BOOT FAIL INVALID SIGNATURE INSTALL#
I mean, could this error mean that I have been compromised in some way and should do a fresh install or something? Or is it just a malfunction? And if so, how do I fix it so that I can use Secure Boot again?
#YOUVIEW BOOT FAIL INVALID SIGNATURE HOW TO#
So basically I need to know what the error means, why I got it, and how to fix this situation. The only thing that I can think of that I might have done last night before this issue this morning occurred is receive some security updates for grub and some other stuff: What does it mean by Image failed to verify with *ACCESS DENIED*? After I pressed OK I managed to get into my BIOS and turn off Secure Boot as well as settings the UEFI only option to accept both UEFI and Legacy, this seemed to do the trick and now it boots, however I am unable to set it so that Secure Boot is on again and this poses a security threat to me so I am wondering what the problem is here? And why I got the error? I mean, is there error something to worry about? And why did it *ACCESS DENIED* me? When I started up my machine this morning (I have Secure Boot and UEFI only enabled) I got this error (sorry for low quality image):
0 kommentar(er)
