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Author Topic: UEFI mystery solved with "optical" in bios  (Read 153 times)

Offline PDP-8

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UEFI mystery solved with "optical" in bios
« on: November 29, 2019, 03:03:45 AM »
Fixed my UEFI-only boot problem on an Intel NUC.  Other modern computers might have the same issue ...

Environment:
I run TC mostly like a CD, and put my data on another device.  That is, when I burn TinyCorePure64 to a usb stick with DD, or other burners, that means you end up with basically a "cd on a stick".  Makes sense since the image when burned shows up as an iso9660 file format on your usb stick.

UEFI - it would never show up as a bootable device on my NUC.  Always had to resort to 3rd party uefi burners.  Not now ..

Secure Boot: ok, simple enough to turn that off.

UEFI:  I run uefi only for speed reasons.  The framebuffer is fast and gorgeous on a modern machine like the NUC that support the framebuffer well.  No legacy or CSM is active.  My offshore "mini-pc" - not so much.

BIOS / Setup fix:  I found in my setup, that the system was not set to boot optical drives.  I never intended to hang a real optical drive off it, so I ignored that setting being unchecked.

Then the light-bulb event:  Since the stick is emulating a cd, using the iso9660 format, it IS an "optical drive" as far as the computer is concerned.

Once I did this in my setup:

Code: [Select]
Optical [X]
And rebooted, TADA - the usb stick shows up as bootable, boots up fine, and now Tinycore in all it's zippy framebuffer glory on the NUC.  UEFI-only baby!

Interestingly enough, there is a similar setting in my "mini-pc" for that as well, but unfortunately, the framebuffer support is sluggish and sloooow.  So xorg is going to be used on that cheap pc.

Anyway - just a hint for those trying to run TCpure64 as uefi only on a modern machine - and of course if you just dd'ed the iso to act like a cd-rom drive - see if your bios/setup has allowed for "optical" drives being allowed to boot!
« Last Edit: November 29, 2019, 03:07:17 AM by PDP-8 »
That's a UNIX book! - cool  -- Garth