[Bug 1734147] Re: Ubuntu 17.10 corrupting BIOS - many LENOVO laptops models

[Alexis Rico]

@Mathieu Trudel-Lapierre Yes, I have two issues:

1) BIOS Doesn't work fine. Same problem as @bruno USB Boot doesn't work,
DVD boot doesn't work and saving bios settings are lost of exit and
save. No white screen just the changes don't persist across reboots.

2) The hard drive failed leaving system non-bootable.

Today I've also tried installing the OS on a new drive and a different
computer, booting through PXE to a Ubuntu Live CD and trying to insert a
new entry for the new os through efibootmgr.

So far I've learnt that efibootmgr is unable to create a new entry as it
errors No such File. And deleting the old EFI entries seems to work but
when rebooting to bios the old EFI entries are still there.

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https://bugs.launchpad.net/bugs/1734147

Title:
  Ubuntu 17.10 corrupting BIOS - many LENOVO laptops models

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  Hi all,

  Basically on Lenovo Y50-70 after installing Ubuntu 17.10, many users
  reported a corrupted BIOS.

  It's not possible to save new settings in BIOS anymore and after
  rebooting, the system starts with the old settings.

  Moreover (and most important) USB booting is not possible anymore
  since USB is not recognized. It's very serious, since our machines do
  not have a CDROM.

  Lenovo forums at the moment are full of topics regading this issue.

  For example:

  https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y50-70-BIOS-Can-t
  -Save-Settings-or-boot-with-USB/m-p/3849142

  https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y50-70-BIOS-Can-t
  -Save-Settings-Or-Exit/m-p/3601285

  https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/y50-70-BIOS-can-t
  -save-settings-and-I-can-t-boot-system/m-p/3865727

  Thank you!!

  #### UPDATE (27/11/2017) ####

  LENOVO machines affected so far:

  Lenovo Y50-70
  Lenovo G40-30
  Lenovo U31-70
  Lenovo G50-70
  Lenovo Z50-70
  Lenovo Yoga Thinkpad (20C0)

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