fstab question

[Phil]

On 7/8/20 11:59 am, Ken D'Ambrosio wrote:
Thank you Ken and Gary for your replies.
> Ah.  This sounds like a case of a disk that isn't in the right mode -- 
> legacy vs. UEFI.  A smart bootloader won't even list a device that 
> isn't bootable -- and if you were legacy in your old system, but UEFI 
> in your new (or vice-versa), that could very well be the problem.
Linux and Windows 10 are showing that they are both in legacy mode.
> GENERALLY, when you boot an Ubuntu (or variant) USB on a UEFI system, 
> you'll see two options for booting it: one is usually just "Ubuntu", 
> and the other is something like "Ubuntu (UEFI)" or somesuch -- but 
> there often are two, and they should be distinguished.
I've checked my bootable USB stick and it only shows one Kubuntu. A 
Ubuntu help document that I came across states that if the boot screen 
is purple then it's in legacy mode. My boot screen, from the USB install 
media, is purple.
> I'd try booting install media and seeing if there are, indeed, two.  
> IF THERE ARE, I'd try booting/installing from the second one, the UEFI 
> one (assuming Windows is booting UEFI), and see if that install works 
> for you.

The BIOS screen shows the following:

UEFI / Legacy - both

UEFI / Legacy Priority - Legacy first

Boot Mode - Quick

Also, the BIOS screen shows that a bootable USB device has UEFI enabled.

I haven't changed anything. Just to repeat, the original SSD rebooted 
both Windows and Linux while the cloned SSD doesn't reboot Linux. 
Therefore, it doesn't seem to me that legacy mode is preventing a Linux 
reboot.

I'm at a loss to know where to turn to next and any suggestion will be 
greatly appreciated.

-- 

Regards,
Phil