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

[bruno]

I dont have a dual boot system, i just have ubuntu 17.10 and since the
upgrade (17.04 to 17.10) im unable to save changes made to the bios such
as boot order, secure boot, intel virtualization, etc.

I can boot into Ubuntu and the output of 'sudo efibootmgr -v' is:

BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,2003,2001,2002
Boot0000* ubuntu	HD(1,GPT,ef50adca-c79c-4471-8c88-4a641917c23d,0x800,0x100000)/File(\EFI\ubuntu\shimx64.efi)
Boot0001* EFI Network 0 for IPv4 (1C-39-47-18-3F-55) 	PciRoot(0x0)/Pci(0x1c,0x2)/Pci(0x0,0x0)/MAC(1c3947183f55,0)/IPv4(0.0.0.0:0<->0.0.0.0:0,0,0)RC
Boot0002* EFI Network 0 for IPv6 (1C-39-47-18-3F-55) 	PciRoot(0x0)/Pci(0x1c,0x2)/Pci(0x0,0x0)/MAC(1c3947183f55,0)/IPv6([::]:<->[::]:,0,0)RC
Boot2001* EFI USB Device	RC
Boot2002* EFI DVD/CDROM	RC
Boot2003* EFI Network	RC

My machine is a Lenovo U31-70.

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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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