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The computer is a DELL Laptop, model: Latitude 3590. BIOS date and version: Dell Inc. 1.4.0 1/3/2018.

I made a new partition layout for a dual boot.

I installed Windows 10 Pro version 10.0.15063.

Then I installed Xubuntu 18.04.

As a result I obtained a dual boot that worked great, for more than 2 months.

One day the computer did not showed the GRUB any more, and initiated Windows 10.

I have restored the GRUB, and I have tested that both systems can boot. However after 24 hours the GRUB is missing again.

I have restored the GRUB 2 times, with same result every time: GRUB missing again after 24 hours. 

To restore the GRUB I utilized a live Xubuntu 18.04 in a pendrive, and I followed this steps:

In the live Xubuntu:  

sudo mount / dev/sda1 /mnt

sudo mount / dev /mnt/ dev sudo mount /proc /mnt/proc

sudo mount /dev/sda2 /mnt/boot/efi sudo chroot /mnt

grub-install --recheck / dev/sda

In the installed Xubuntu:

sudo update-grub2

This is the BIOS configuration am using: -Sata Operation: RAID ON

-Secure Boot Enable: Disable

-Enable Legacy Options ROM's: true

-Enable Attempt Legacy Boot: false

-Boot List Options: UEFI

I have a dual boot of both systems in a PEAK laptop. And never has failed since its installation. So, I think this issue is related with the BIOS or its configuration.

This are my questions: 1) What am I doing wrong ? 2) Does DELL-Latitude 3590 need a special BIOS settings for the dual boot that I need ?

Any suggestion is welcome ! Thank you very much in advance !

eliastg
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1 Answers1

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The solution I have found is to use SHIMx64 in the boot selection setting, in the BIOS.

This is described in detail in this DELL article: XPS 13 9343: How to Install Ubuntu Developer Edition 14.04 on a Dell PC Configured for the Unified Extensible Firmware Interface (UEFI) BIOS

There is also another good explanation of why this works in this question: What is the difference between grubx64 and shimx64?

I hope this can help others.

eliastg
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