[Bug 1531861] [NEW] System crash on installation of GRUB2-SIGNED package

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I run Linux Mint 17 Cinnamon 64 bit on a Toshiba Satellite laptop (Intel
i5 2.6GHz x 2).

When I attempt to run a suggested system update, a new Grub package is offered: 'grub2-signed' EFI AMD64 version 1.34.8
During installation the system crashes. I've tried this several times. It also crashed using the previous 1.34.7 version.
The last line reported in the 'Applying changes' box is: 'Installing for x86_64-efi platform.'

Then the system becomes progressively less responsive until after a few
minutes also the mouse cursor freezes and only a hard reset works.

It would be really appreciated if someone could have a look into this.
Linux Mint is great otherwise, wouldn't have anything else!

Thanks for all your efforts!

Roel

** Affects: grub2-signed (Ubuntu)
     Importance: Undecided
         Status: New

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System crash on installation of GRUB2-SIGNED package
https://bugs.launchpad.net/bugs/1531861
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