Can't change BIOS settings to boot from external drive

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I have a Lenovo U430 that has a SSD and HDD in a dual-boot configuration: Ubuntu on the SSD, Windows on the HDD. This setup has been stable for a couple of years.

I would like to wipe the Ubuntu / partition and install another distro, but I can no longer boot from USB or my USB DVD drive. Booting from USB is enabled, and I have done so in the past.

I can access the BIOS (InsydeH2O 3.7) but no changes will persist. I set the boot priority and enable legacy mode, but the computer boots straight into Grub on the SSD. When I shut down and go back to the BIOS, the changes are gone. I have successfully changed settings in the past, such as enabling virtualization.

I've seen things online that suggest an administrative password is necessary - even this does not persist across reboots.

I thought it might be the CMOS battery, but I pulled that and checked it with a multimeter. It still reads over three volts.

I pulled the CMOS battery out overnight and was able to set the time correctly again, but no other settings changes will stick.

When I hit the button to start the BIOS a different option for the boot menu appears. It offers Ubuntu, Windows, and network PXE. None of these are the USB drive.

The firmware/BIOS version is the most current on the lenovo site.

After having problems I have been testing with a known good bootable USB I used on another system. Initially I was using a Debian image created with Yumi.

Potential courses of action:

  • disconnect both drives and boot with only the USB.

  • move SSD to known good box

Neither of these fix the problem of my BIOS failing to save changes, but would potentially allow me to reinstall the OS.

What other options could I try?



Submitted April 14, 2018 at 03:43AM by Max_Vision https://ift.tt/2GXA722

Title :Can't change BIOS settings to boot from external drive
Source :Can't change BIOS settings to boot from external drive

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