your right I must have been in the MBR version of grub. I tried it this morning and it was not working.
On Thu, Feb 28, 2019 at 4:54 PM Steve <[email protected]> wrote: > > chainloader (hd2)+1 > > This does not work if you have booted via UEFI to grub2. > It only works if you have MBR-booted to grub2, > > If you have UEFI-booted then > chainloader (hd2)+1 > will always give the error: > error: invalid EFI file path. > > > On Thu, 28 Feb 2019 at 23:38, Jeff Sadowski <[email protected]> wrote: >> >> Interesting someone suggested chain-loading >> the MBR version of the boot loader and boot DOS from there. >> Which worked. >> >> I did >> chainloader (hd2)+1 >> >> Then I was able to use the DOS menuentry to boot DOS. >> >> On Thu, Feb 28, 2019 at 5:59 PM Steve <[email protected]> wrote: >> > >> > When you UEFI-boot, the CPU is in Long Mode and there is no BIOS support >> > (BIOS interrupts are not supported). >> > >> > DOS works in Real Mode and uses BIOS interrupts for kbd, screen and disk >> > access, etc. >> > >> > So there is no way you can UEFI-boot to DOS! >> > >> > >> > >> > On Thu, 28 Feb 2019 at 22:52, Jeff Sadowski <[email protected]> >> > wrote: >> >> >> >> OK I've been trying a bunch of things here but not having much luck. >> >> >> >> I am familiar with normal booting from UEFI grub and MBR versions of grub >> >> >> >> I can boot DOS from Legacy Grub with the following >> >> >> >> grub> root='hd2,msdos1' >> >> grub> parttool ${root} hidden- >> >> Setting partition type to 0x6 >> >> grub> drivemap -s (hd0) ${root} >> >> grub> chainloader +1 >> >> >> >> If I try this in UEFI grub >> >> >> >> grub> root='hd2,msdos1' >> >> grub> parttool ${root} hidden- >> >> Setting partition type to 0x6 >> >> grub> drivemap -s (hd0) ${root} >> >> error: can't find command `drivemap'. >> >> grub> chainloader +1 >> >> error: invalid EFI file path. >> >> >> >> If I try and let update-grub fix it They go away completely if I boot >> >> from UEFI mode. >> >> >> >> For now I have resigned to just booting everything from Legacy mode >> >> but would like to know if it is possible to use it from UEFI mode? >> >> >> >> _______________________________________________ >> >> Help-grub mailing list >> >> [email protected] >> >> https://lists.gnu.org/mailman/listinfo/help-grub _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
