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A month ago I installed Lubuntu 18.04 to my new Acer a315-21. I downloaded the .iso, used Rufus to make a bootable USB Stick, and then installed it to my hard drive. Everything worked fine until today when I pressed the F2 key to go to the BIOS and discovered that the Boot Priority order is completely blank (i.e. it displayed some dots). Even with a USB (Puppy Linux iso burned with Rufus) inserted it does not detect it. How do I boot into USB, and is this normal?

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Please note that I have encryption enabled, Lubuntu is now at 18.04 and inside Lubuntu everything works fine (i.e. the drive is detected).

  • The laptop came with Windows 10 pre installed and last month when I bought it,I opened the BIOS and saw my hard disk code in the boot priority order.I'm guessing maybe Lubuntu did something because other than setting a HDD pasdword and BIOS password(before Lubuntu),I did not touch it for a month. – Tanmap Aug 15 at 10:23
  • Okay,so switching to Legacy and rebooting all the drives are displayed but even if HDD0 is at first position in boot order,Lubuntu won't boot.I get a black screen with Intel(R) logo saying no boot devices found.Switching back to UEFI Lubuntu boots but the drive letter for HDD0 is again gone. – Tanmap Aug 15 at 10:54
  • I thought it might help to put a diagram in your question showing the difference between the Legacy boot process and the UEFI boot process. The EFI boot loader is usually stored on a separate partition from HDD0. You can delete the diagram after you've seen it by editing your question. Rescatux is usually pretty good at detecting the EFI partition. See this answer. – karel Aug 15 at 11:10
  • I will try Rescatux and post the updates,thanks. – Tanmap Aug 15 at 11:22

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