Have ASUS X551M Notebook PC. Boots Windows 8.1 Want to dual boot Ubuntu. Need clarification on Bios setup. What does "BIOS" add boot option really want when it says it wants a format of fs0:\path\filename.efi? hd0,gpt7 Doesn't look like the right format but neither does "Windows Boot Manager (P0: HGST HTS545050A7E680)" which is option 1 and the only option. Nor does it look like or "P1: TSSTcorp CDDVDW SN-208FB" which is available for the DVD if I enable CSM (Compatibility Support Mode) to boot from the Ubuntu Live DVD.
It is difficult to formulate a simple question when I don't know what I need to know to fix the problem. I could not find a better description of "BIOS" settings from either ASUS or American Megatrends. Aptio Setup Utility version 2.15.1236 (c) 2013 bios version 504
I have tried to describe what I have done. GRUB2 should be able to chainload to windows if I could get to it. I cannot read/see hd0,Gpt6 so don't know if a *.efi file exists there. How does Bios settings Boot Override work? It claims to search for a shell.efi from the file system but doesn't find one. Any pointers to other sources will be appreciated. Thanks for your consideration.
Trying to dual boot 64 bit pre-installed Windows 8.1 with Ubuntu 14.04 Intel x86 for the Celeron N2830 64 bit CPU in my ASUS X551M Notebook PC. Install went well but PC boots only to Windows.
from:http://releases.ubuntu.com/14.04/, guided by the following text: {"There are two images available, each for a different type of computer: PC (Intel x86) desktop image For almost all PCs. This includes most machines with Intel/AMD/etc type processors and almost all computers that run Microsoft Windows, as well as newer Apple Macintosh systems based on Intel processors. Choose this if you are at all unsure. 64-bit PC (AMD64) desktop image Choose this to take full advantage of computers based on the AMD64 or EM64T architecture (e.g., Athlon64, Opteron, EM64T Xeon, Core 2). If you have a non-64-bit processor made by AMD, or if you need full support for 32-bit code, use the Intel x86 images instead." } I chose Intel x86 for the Celeron N2830 64 bit CPU in my ASUS X551M Notebook PC, downloaded the .iso file and burned a Live DVD. Changed "BIOS" settings to enable CSM (Compatibility Support Mode) and disable secure boot in order to boot from the DVD and try Ubuntu worked fine. When I started an install, there was no option to install alongside windows 8.1. I backed out, rebooted to 8.1 and made a usb recovery drive. The next install from the Ubuntu Live DVD gave me the option to install Ubuntu alongside 8.1 which I chose. The install offered to split the available disk space 50/50 or use a gui to change it to something else which I did. The install proceeded as expected from my experience with Ubuntu12.04 and completed grub-install then asked for a reboot.
There was no grub menu and the reboot proceeded to Windows.
Post install, gparted reports the following:
Partition FileSystem Mount Point Label Size Used Unused Flags
/dev/sda1 fat32 SYSTEM 100MiB 29.46MiB70.54MiB boot
/dev/sda2 ntfs Recovery900MiB 287MiB 612MiB hidden,diag
/dev/sda3 ! unknown 128MiB --- --- msftres
/dev/sda4 ntfs OS 304GiB 29.0GiB 275GiB msftdata
/dev/sda6 ! unknown 1.00MiB --- --- bios_grub
/dev/sda7 ext4 media/ubuntu/UUID 136GiB 5.48GiB 131GiB
/dev/sda8 linux-swap 3.89GiB 4KiB 3.89GiB
/dev/sda5 ntfs Restore 20GiB 8.76GiB 11.25Gib hidden,diag
NOTE:UUID for /dev/sda7 above is for the partition
/dev/sda1 is EFI SYSTEM Partition (ESP).
"BIOS" add boot option says it wants a format of fs0:\path\filename.efi.
do I need to add a boot option of the form P0:\part7? How would I specify partition7 in windoweze?
Boot Override in "Save Changes and Exit" lists
Windows Boot Manager (P0: HGST HTS545050A7E680) This is the internal hard drive
P1: TSSTcorp CDDVDW SN-208FB This is the internal DVD
UEFI: Crucial Gizmo! 1100 This is the Windows 8.1 16GB recovery thumb drive
Crucial Gizmo! 1100 This is an 8 GB thumb drive I was using to save data from the live Ubuntu O/S
From grub.cfg in gpt7 viewed by Ubuntu Live from the DVD, the following lines:
if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt7 --hint-efi=hd0,gpt7 --hint-baremetal=ahci0,gpt7 My-UUID as listed by gparted above
else
search --no-floppy --fs-uuid --set=root My-UUID as listed by gparted above
fi
seem to indicate that grub is prepared to boot Ubuntu by EFI if given the opportunity.
I suspect that gpt6 holds a clue with flag bios_grub. This may be the starting point for grub but I don't know how to point the "BIOS" to this location. Most other problems I read can't get into windows. I can get into Ubuntu only from the Live DVD and if I enable CSM. I have tried with both CSM enabled and disabled but don't get to grub.
New: The following terminal results of the installed Ubuntu system from the Live DVD indicate that there is no sys/firmware/efi and no boot/efi which might indicate a non efi installation. However, the image on disk is not a running Ubuntu system so perhaps their lack is explained by these files being created at boot time. Is it possible to chroot into gpt7 from the live DVD and should I expect that to help? I notice some of the suggested diagnostics are Linux commands but believe they provide answers only to the running system.
ubuntu@ubuntu:~$ ls /media/ubuntu/"UUID-of-/dev/sda7"/boot
abi-3.13.0-24-generic initrd.img-3.13.0-24-generic memtest86+_multiboot.bin
config-3.13.0-24-generic memtest86+.bin System.map-3.13.0-24-generic
grub memtest86+.elf vmlinuz-3.13.0-24-generic
ubuntu@ubuntu:~$ ubuntu@ubuntu:~$ ls /media/ubuntu/"UUID-of-/dev/sda7"/boot/grub
fonts gfxblacklist.txt grub.cfg grubenv i386-pc locale
ubuntu@ubuntu:~$ ls /media/ubuntu/"UUID-of-/dev/sda7"/sys
ubuntu@ubuntu:~$ ls /media/ubuntu/"UUID-of-/dev/sda7"/mnt
ubuntu@ubuntu:~$ ls /media/ubuntu/"UUID-of-/dev/sda7"/media
