[ltp] Booting from thumbdrive...

[cr]

On Thursday, 20 August 2020, 7:55:07 am AWST, Zed <zed at zed.net.nz>
wrote: 
>  The help of members is sought to solve a problem regarding booting
> from a usb thumbdrive, please.
> 
> Using Linux Mint v20.0 on a Lenovo Thinkpad T450s
> 
> My T450s does not have a DVD/CD drive, so I wrote an ISO for Gecko
> Linux to bootable USB thumb drive.  The write was successful.
> 
> However, when I cam to choose which media to boot from on reboot (and
> on a complete close down and restart), the  USB thumb drive was not
> shown.
> 
> Cannot find anything in BIOS which requires changing.
> 
> Zed

Zed, don't know if this helps but when I put Debian on my L440 I first
had to do some futzing around in Windows10 to prize its cold dead
clutch (aka Secure Boot) off the boot order before I could get into
the BIOS.    
I can't recall if it hid USB from the BIOS options.

You may need to change the boot from UEFI to Legacy - 
I've just looked at my L440 BIOS and I see it's now set as:
Startup:
    UEFI/Legacy Boot  -  [Both]
        -- UEFI/Legacy Boot Priority	[Legacy First]

and   Boot Order Lock			[Disabled]
		(Enabled  would lock the boot order)         

There's a Lenovo page on USB boot sequence here:
https://support.lenovo.com/nz/en/solutions/ht118361
and a Microsoft page on how to disable Secure Boot here:
https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/disabling-secure-boot



HTH

cr