hi Chris,

normally ESC will provide you with the boot device menu, but you're using a very old, buggy, and unsupported firmware on your device. I'd recommend updating to mine, which is not only newer, but will allow you to set USB as the higher priority/default at the time of installation

see: https://mrchromebox.tech/#fwscript 

cheers, 
Matt 

On Mon, Aug 26, 2019, 11:02 AM Chris 😶🙃😵 <chip.shorter@outlook.com> wrote:
Good day,

A have a Samsung Series 3 Chromebox on which I installed SeaBIOS (version 181214_15:29-johnlewis.ie) a few years ago.
I then installed Linux Mint, along with a GRUB.
I would like to know how to access the BIOS settings, i.e. which key or combination of keys do I press at boot time?
SeaBIOS displays "press ESC for boot menu" at boot time, but this just gives me the GRUB menu, not the BIOS settings.
The main reason that I need to access the BIOS settings is because it is not prioritising booting from USB over the hard drive (which is SSD). 

Kind regards,

Chris


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