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

[Marcin Ciosek]

This is not Ubuntu bug.
I've created the workaround description (user marcin78 here) and as you can clearly see, it refers to my Antergos installation being the last one writing BIOS.
I think (I'm not system expert) that this can be related to the way the kernel update scripts (modules rebuild or mkinird or any other) is handling the process. It could be that other system users don't do so many BIOS rewrites (Windows is updated in a different way) and this problem is not affecting most of PC users. Although there are reports also from Windows installations.
So far the fix is replacing the chip. Far beyond most of our skills and definitely won't come cheap from Lenovo service.
Hope the rEFInd tip can serve you for now.
Marcin

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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:
  Confirmed

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 (25/11/2017) ####

  LENOVO machines affected so far:

  Lenovo Y50-70
  Lenovo G40-30
  Lenovo U31-70
  Lenovo G50-70

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