[Bug 1600224] Re: shim-signed updates break self signed UEFI systems

[xzqjack]

Hi, i'm a newer to Ubuntu.I want to tell you about my experience about
some mistake of shim-signed package and my way to figure out it.

Yesterday, some mistake about shim-signed occurred.The updater of Ubuntu
got stuck and turned black. I have to force closing updater.But when i
reboot the computer, i couldn't enter the Ubuntu graphical interfaces.
When i input password and press login , scree flashed and ask for
passward again. However, the "tty1" (press Ctrl+Alt+F1) worked fine.

Then i remove shim-signed and reinstall  it.The install process ask me
to disable UEFI secure boot. I choose No on first time and yes on second
time. But both didn't work.

Finally, i entered BIOS and turn the secure boot item into "other
operation system " from "Windows UEFI". And it workd fine.

I completely have no idea about that. I wish my experience could provide
something useful to help improve shim-signed.

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https://bugs.launchpad.net/bugs/1600224

Title:
  shim-signed updates break self signed UEFI systems

Status in shim-signed package in Ubuntu:
  New

Bug description:
  Updating shim-signed on a self signed UEFI platform without Microsoft
  keys is rendered unbootable. An example is a QEMU instance that is
  self signed.

  Isn't there a way to notify the platform owner that they should resign
  their UEFI utilities before rebooting ?

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