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No Bootable Devices Found After Ubuntu Installation on Dell

cn flag

I'm trying to install Ubuntu on a Dell Latitude 5490. Ubuntu will be the only OS I use on this computer

Steps I've taken:

  • Used Rufus to put DBAN on a flash drive and autonuke C: drive
  • Used Rufus to put ubuntu-20.04.3-desktop-amd64.iso on a flash drive
  • Booted from flash drive, Try Ubuntu works well
  • Installed Ubuntu, appeared to succeed
  • Upon restart, computer shows "No bootable devices found"
  • Dell Diagnostics indicates all hardware is working correctly/found
  • Enabled Secure Boot, and attempted to define a UEFI Boot Option for Boot Sequence. The EFI Boot Selection screen for selecting a file shows :FSO but is otherwise blank. When I manually enter the file \EFI\ubuntu\grubx64.efi, I still get the "No bootable devices found" screen (disabling Secure Boot and booting from Legacy Option ROMs also failed)
  • I tried running boot-repair from Try Ubuntu, which I saw in another post. It ran successfully but still same error upon restart
  • I reinstalled Ubuntu from flash drive, and it does see that Ubuntu is already installed. I re-did the installation anyway but still same issue

I feel like I'm running out of ideas on what to try next and would love any advice. Thank you!

lucki1000 avatar
us flag
Try it in UEFI with secure boot disabled, then you must be able to start grub
THIRDLOOKintern avatar
cn flag
@lucki1000 what File Name or Boot Option should I use? I am trying now with Secure Boot disabled, Legacy Option ROMs disabled, and using UEFI Boot Option with File System List `PCiRoot(0x0)/Pci(0x17.0x0)/Sata(0x2.0x0)/HD(1.MBR.0x81A3237C)` and File Name: `\EFI\ubuntu\grubx64.efi`. Still not working though. Thank you!
lucki1000 avatar
us flag
You are using MBR, on your HD you must change your partition table of your HD, means you start gparted, select your install disk, go to the tab with the label `device` and click create partition table, then you have to select `GPT` after that you can boot up your PC
skb007 avatar
in flag
Sorry to put a comment in the answer section, I dont have enough reputation for comment. Did you manage to resolve the issue? I am in the same boat, i am install it on Dell vostro 470. It has a built in RAID, I am not sure if it is causing any issue.
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