I don't know if this will be of any help, but with R4 rc4, I installed it on a Dell laptop and had a similar problem with dual boot (though I installed Qubes on a second external hard drive). The UEFI stuff just didn't work. My solutions was to install Qubes in legacy mode, but left Windows in UEFI. I couldn't use the grub menu to boot, but instead had to hit F12 during boot to bring up the BIOS boot sequence menu. From that, I could choose either Windows or KDE neon from the UEFI list, or qubes from the legacy list. Note that this meant that I had a /boot/efi on the external drive *and* a /boot/efi on my native drive. I haven't installed R4 on my internal drive yet, but plan to do it this weekend.
I suspect that you can probably choose to boot Windows from the BIOS boot sequence menu if you have both legacy and UEFI turned on. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/08390e07-759c-4bff-bd95-c5b143212329%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.