Comment 2 for bug 1600224

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.