How to configure Grub to boot instead of Windows

[firenice03]

[quote author=stevef link=topic=8398.msg57124#msg57124 date=1637911936]
As far as I can see, even if you edit grub, your boot manager is still pointing to windows. To access to the boot manager on power up requires pressing the correct key at the right time which is deliberately made difficult.  Without the same hardware it is difficult to advise much.  To get into the system boot manager have you tried

Windows Start
Settings
Update & Security
Recovery
Restart Now
Troubleshoot
Advanced
UEFI Firmware Settings
Restart

This should reboot into the boot manager.  The acer boot manager *may* allow you to re-order boot options and shift grub (or ubuntu) to the top.  If not, the best bet (in my view) is to look for a way to make the boot manager reliably accessible by hot key on each boot.  Look for something like a 'hot key delay'.  Setting a power on password might help as you know to press the hot key immediately after the password.

If you can't progress this route, the windows tool bcdedit might be worth looking at.

Thanks a lot Steve. I feel like I have tried most of that, but I'll try the other things you suggested. I really appreciate your response, and will let you know how it goes.

Thanks,
Adrian
[/quote]

I'd second this...
UEFI boot menu/options and look for the UEFI boot order - choosing 'ubuntu' and saving....