Grub2 question.

[Ed_P]

If I boot Porteus via the EFI folder I get the porteus.cfg menu to appear.

Code: Select all

menuentry " Porteus 4.0 USB - EFI" --class slackware   --class icon-porteus  {

     set bootmgr=/EFI/boot/bootx64.efi          #grubx64.efi    # bootx64.efi

     set bootdrv=$root
     search -f $bootmgr --set=root
     if [ $root != $bootdrv ]; then
        chainloader $bootmgr
     else
        echo "----------------------------------------"
        echo USB drive NOT found.
        echo
        sleep -v -i 10
     fi
     set root=$bootdrv
     }

How do I do that on a normal, non-EFI, menu? I've tried setting the bootmgr to /boot/syslinux/vmlinuz and /boot/syslinux/initrd.xz and used chainloader $bootmgr and chainloader +1 to no avail. Yes, I'm guessing.

I know how to boot Porteus directly using grub2 menu parms but was impressed to see the EFI boot option invoked the Porteus boot menu and would like to try seeing it like a direct boot of the drive shows.

Added in 11 hours 26 minutes 11 seconds:
This works!

Code: Select all

menuentry " Porteus 4.0 USB - syslinux" --class slackware --class icon-porteus {

     set bootmgr=/boot/syslinux/isolinux.bin

     set bootdrv=$root
     search -f $bootmgr --set=root
     if [ $root != $bootdrv ]; then
        syslinux_source $bootmgr
        syslinux_configfile /boot/syslinux/porteus.cfg
     else
        echo "----------------------------------------"
        echo Porteus drive NOT found.
        echo
        sleep -v -i 10
     fi 
     set root=$bootdrv
     }

Not the same background as my EFI boot menu but the menu items are definitely the same.

[raja]

ed_p,

porteus disk ???

1)Should we have an USB disk with volume name 'porteus' and boot,porteus folders in it?
or
2)a CD burnt with porteus iso

where is grub looking for 'porteus' disk?

thanks.

[Ed_P]

1)Should we have an USB disk with volume name 'porteus' and boot,porteus folders in it?
or
2)a CD burnt with porteus iso

Which ever is more convenient for you. Personally I use ISOs and USB drives.

where is grub looking for 'porteus' disk?

Where ever you tell it to look. Personally I have grub search for it.

The code I posted above was a new approach for me in booting my USB drive. Normally I use a menu like this:

Code: Select all

menuentry " Porteus Cinnamon 3.2.2 ISO - changes=" --class slackware   --class icon-porteus  {

     set linux_folder=/porteus3.2
     set iso=/ISOs/Porteus-CINNAMON-v3.2.2-x86_64.iso
     set boot_parms="volume=33 reboot=cold changes=EXIT:$linux_folder/changes/porteussave.dat extramod=$linux_folder/Modules"
#     set boot_parms="nomodeset verbose delay=8 volume=33 reboot=cold changes=EXIT:$linux_folder/changes/porteussave.dat extramod=$linux_folder/Modules"
     set gfxpayload=1024x768

     if [ -f /boot/syslinux/vmlinuz ]; then linux_folder=""; fi
     search -f $iso --set=root
     loopback loop $iso
#     linux (loop)/boot/syslinux/vmlinuz from=$iso $boot_parms
     linux        $linux_folder/vmlinuz from=$iso $boot_parms
     initrd (loop)/boot/syslinux/initrd.xz
     }

[Bicephale]

On my to-do list too!