Just FYI, if you have access to grub, you can enter command monde by typing
c and then you can boot from USB :
set root=(hd1,1)
chainloader +1
boot


Le 20 déc. 2017 22:21, "ilmondo" <email address hidden> a écrit :

> Same problem on my Lenovo G50-70 doesn't save anymore BIOS settings
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1734147
>
> Title:
>   Ubuntu 17.10 corrupting BIOS - many LENOVO laptops models
>
> Status in linux package in Ubuntu:
>   Confirmed
> Status in linux-hwe-edge package in Ubuntu:
>   Confirmed
> Status in linux-oem package in Ubuntu:
>   Confirmed
> Status in linux source package in Xenial:
>   Invalid
> Status in linux-hwe-edge source package in Xenial:
>   Fix Committed
> Status in linux-oem source package in Xenial:
>   Fix Committed
> Status in linux source package in Artful:
>   Fix Released
> Status in linux-hwe-edge source package in Artful:
>   Invalid
> Status in linux-oem source package in Artful:
>   Invalid
> Status in linux package in openSUSE:
>   New
>
> Bug description:
>   SRU Justification
>
>   Impact: Many users are reporting issues with bios corruption with
>   17.10. This seems to stem from enabling the intel-spi-* drivers in the
>   kernel, which don't appear to be ready for use on end-user machines.
>
>   Fix: Disable this driver.
>
>   Test Case: Fix has been verified by our HWE team on affected hardware.
>
>   Regression Potential: Minimal, it's unlikely anyone is actually doing
>   anything which requires this driver.
>
>   ---
>
>   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.
>
>   Thank you!!
>
>   #### UPDATE (01/12/2017) ####
>
>   LENOVO machines affected so far (please add your affected model to
>   this list):
>
>   Lenovo B40-70
>   Lenovo B50-70
>   Lenovo B50-80
>   Lenovo Flex-3
>   Lenovo Flex-10
>   Lenovo G40-30
>   Lenovo G50-70
>   Lenovo G50-80
>   Lenovo S20-30
>   Lenovo U31-70
>   Lenovo Y50-70
>   Lenovo Y70-70
>   Lenovo Yoga Thinkpad (20C0)
>   Lenovo Yoga 2 11" - 20332
>   Lenovo Z50-70
>   Lenovo Z51-70
>   Lenovo ideapad 100-15IBY
>
>   The bug also affects:
>   Acer Aspire E5-771G
>   Acer TravelMate B113
>   Toshiba Satellite S55T-B5233
>   Dell Insperion (with Insyde Software BIOS)
>
>   ---
>
>   Temporary workaround:
>   https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y50-70-BIOS-Can-t
>   -Save-Settings-Or-Exit/m-p/3853208#M157885
>
>   ---
>
>   result from apport-collect 1734147:
>
>   ---
>
>   Architecture: amd64
>   InstallationDate: Installed on 2017-10-22 (37 days ago)
>   InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64
> (20171018)
>   MachineType: LENOVO 20378
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-17-generic
> root=UUID=7def04d3-7336-44b2-a084-2415f9dc2328 ro quiet splash
> vt.handoff=7
>   ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
>   RelatedPackageVersions:
>    linux-restricted-modules-4.13.0-17-generic N/A
>    linux-backports-modules-4.13.0-17-generic  N/A
>    linux-firmware                             1.169
>   Tags:  artful wayland-session
>   Uname: Linux 4.13.0-17-generic x86_64
>   dmi.bios.date: 08/12/2015
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: 9ECN43WW(V3.03)
>   dmi.board.name: Lenovo Y50-70
>   dmi.board.vendor: LENOVO
>   dmi.board.version: 00000000Not Defined
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: Lenovo Y50-70
>   dmi.modalias: dmi:bvnLENOVO:bvr9ECN43WW(V3.03):bd08/12/2015:svnLENOVO:
> pn20378:pvrLenovoY50-70:rvnLENOVO:rnLenovoY50-70:rvr00000000NotDefined:
> cvnLENOVO:ct10:cvrLenovoY50-70:
>   dmi.product.family: IDEAPAD
>   dmi.product.name: 20378
>   dmi.product.version: Lenovo Y50-70
>   dmi.sys.vendor: LENOVO
>
>   ---
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
> 1734147/+subscriptions
>