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I am having trouble booting Ubuntu from my Toshiba Satellite (S-50 Series Laptop).

During the installation, I chose to delete Windows and have Ubuntu as the only OS on the system. I think this is called a clean install but correct me if I'm wrong (as I'm new).

After the installation, when I turn on the laptop I get this :

message I then looked for some answers to this and I learned how to access the BIOS on my laptop. Many tutorials such as this suggested that I go to the Security tab and then select Select an UEFI file as trusted for executing.

For some reason my laptop doesn't seem to have this option. I tried setting up a BIOS Supervisor password :

enter image description here. You can see that the Supervisor password is registered but there is no option to Select an UEFI file as trusted for executing. The options that do appear (Boot Menu, BIOS User Password permission, etc.) can only be toggled to Enabled or Disabled.

I then tried to look if there was anything in the other tabs. Under the Advanced tab there is a System Configuration option :

enter image description here Clicking that option, I then get into this :

enter image description here. When I click Boot Mode, there are only two options: UEFI Boot or CSM Boot. I still cannot seem to find Select an UEFI file as trusted for executing.

What should I do? Is there any other way I can get Ubuntu up and running on my hard drive? I can run from the USB just fine but I can't seem to run it on the hardware.

Thank you.

Parsa Mousavi
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lotus
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    The "Trusted..." is a vendor specific modification (Acer?), so not appearing on your Toshiba is not a surprise. May the /EFI file is missing because the install was legacy, not UEFI, try setting to CSM mode and see if boot then works. – ubfan1 Jun 11 '20 at 15:14
  • Go to BIOS and reset it to factory settings, set UEFI boot (not CSM), turn off Secure Boot and Fast boot (if it exists), boot to a Ubuntu Live DVD/USB, use gparted to install a fresh GPT partition table (this will wipe the drive), and reinstall Ubuntu. Report back. – heynnema Jun 11 '20 at 16:06
  • @ubfan1 so when I set it to CSM and then restarted my laptop, the laptop keeps prompting me to insert media – lotus Jun 11 '20 at 17:46
  • @heynnema so in gparted I just do Create Partition Table ? I don't need to select a previous partition? I have a picture of what I mean but idk how to post a picture to a comment. – lotus Jun 11 '20 at 18:04
  • No, you don't need to select any partition when you create a new partition table. Select GPT table. Understand that this will wipe the drive, and prepare it for a clean Ubuntu install. – heynnema Jun 11 '20 at 18:45
  • @heynnema I just tried what you suggested but I still get the error message from my original post. It always seems like my computer is checking for a USB and not running from hard drive. Is there anything else that you suggest I try? – lotus Jun 11 '20 at 18:48
  • It doesn't run from the hard drive. You booted to a Ubuntu Live DVD/USB, yes? You started gparted, yes? You selected your hard disk drive in the pop up in the upper-right of the gparted window, yes? You went to the Device menu and selected create new partition table, yes? – heynnema Jun 11 '20 at 19:01
  • Yes I did all of that. I have a picture of it but I'm unsure how to post it to the comments. Right now I'm trying something from a different thread in which they try to boot through CSM like @ubfan1 suggested – lotus Jun 11 '20 at 19:14
  • No, don't boot via CSM. Don't follow multiple instructions at the same time. – heynnema Jun 11 '20 at 19:22
  • Post images to imgur.com. – heynnema Jun 11 '20 at 19:24
  • @heynnema I changed the boot to CSM and then reinstalled Ubuntu and now it works. Thank you guys for trying to help! – lotus Jun 11 '20 at 19:27

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I'd strongly recommend you to boot Ubuntu as LEGACY BIOS rather than UEFI. It works best and you also have an option of dual/triple boot.

If your laptop is new, chances are that their is a UEFI and OEM partition already set-up which prevents installation of other OS. You can use the diskpart utility in windows (reinstall windows and delete the partitions) and then install ubuntu.

In your BIOS, select the boot option as Legacy. You have set it to UEFI. Try booting now. If it still doesn't work, then re-insert your bootable USB and then I suggest making manual partitions. Select create new partition table. In this menu, you will get to know if Windows is properly removed or not. Now you can install ubuntu by making the boot, root and home partitions.

demonkiller
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