This is my take on that statement. If all O/S is installed in legacy mode, you will be good to go since there will be no UEFI device to boot from. If a UEFI O/S is installed, you cannot boot legacy O/S at all without a boot manager that can see and boot both UEFI and legacy O/S. So, installing both Win7 and Mint in UEFI would work or installing both Win7 and Mint in legacy mode will also work.pbear wrote: ⤴Fri Sep 20, 2019 9:49 pmWell, that last screenshot is the problem. To save anyone having to jump back, it says, "When Legacy Support is enabled, UEFI boot order and Legacy boot order are both available and UEFI boot order has higher priority than Legacy boot order." FWIW, I have a more recent HP with Insyde v.45 and it says the same thing on this screen, so I doubt there's anything to be gained by updating the firmware (v.45 is the latest available for mine).
Frankly, I'm stumped. And wonder how anyone ever installed Mint in legacy mode on an HP. Or did they? Throwing the floor open for suggestions.
Did some testing and found that with firmware set to UEFI with CSM, booting Mint 64bits in compatibility mode get Mint to boot in legacy mode on my HP laptop. Legacy support mode is enabled per second picture of firmware (System Configuration).