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

[tobia antoniolli]

@Mathieu Trudel-Lapierre (cyphermox)
@Dimitri John Ledkov (xnox) 

Hi, thank you for having a look.

To be more clear about this issue:

I had Linux Mint before switching to Ubuntu 17.10 few days ago - no dual
boot, just Ubuntu

I can access BIOS (either via f12 or one-key recover mode)

I can change all BIOS settings, but the issue is that when rebooting,
the BIOS keeps the old settings so the machine keeps rebooting in safe-
mode. Thus usb is not recognized.

https://ibb.co/fHntcm (bios, boot menu)

before installing Ubuntu 17.10, USB was present as third option under the sub-section Legacy.
Now it's not recognized.

I hope this make things clearer.

The USB option is not present obviously even when pressing f12 at
startup (for selecting the boot source) https://ibb.co/msfziR


Ubuntu 17.10 is working properly for me, and within Ubuntu USB ports work properly.

Let us know if you need more details, thanks

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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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