It seems I somehow kicked out my 'diskdrive boot-option' for my blueray-diskdrive.
I tried to fix it with 'efibootmgr' but I'm not getting anywhere. I think I just don't understand how to use this program.
here is what efibootmgr tells me about my boot sequence:
BootCurrent: 0001 Timeout: 0 seconds BootOrder: 0001,0000 Boot0000* ubuntu Boot0001* ubuntu
Does anybody know how I can add my diskdrive to the sequence?
efibootmgr is giving me the following options:
efibootmgr version 0.5.4 usage: efibootmgr [options] -a | --active sets bootnum active -A | --inactive sets bootnum inactive -b | --bootnum XXXX modify BootXXXX (hex) -B | --delete-bootnum delete bootnum (hex) -c | --create create new variable bootnum and add to bootorder -d | --disk disk (defaults to /dev/sda) containing loader -e | --edd [1|3|-1] force EDD 1.0 or 3.0 creation variables, or guess -E | --device num EDD 1.0 device number (defaults to 0x80) -g | --gpt force disk with invalid PMBR to be treated as GPT -H | --acpi_hid XXXX set the ACPI HID (used with -i) -i | --iface name create a netboot entry for the named interface -l | --loader name (defaults to \elilo.efi) -L | --label label Boot manager display label (defaults to "Linux") -n | --bootnext XXXX set BootNext to XXXX (hex) -N | --delete-bootnext delete BootNext -o | --bootorder XXXX,YYYY,ZZZZ,... explicitly set BootOrder (hex) -O | --delete-bootorder delete BootOrder -p | --part part (defaults to 1) containing loader -q | --quiet be quiet | --test filename don't write to NVRAM, write to filename. -t | --timeout seconds set boot manager timeout waiting for user input. -T | --delete-timeout delete Timeout. -u | --unicode | --UCS-2 pass extra args as UCS-2 (default is ASCII) -U | --acpi_uid XXXX set the ACPI UID (used with -i) -v | --verbose print additional information -V | --version return version and exit -w | --write-signature write unique sig to MBR if needed -@ | --append-binary-args file append extra args from file (use "-" for stdin)
So with '--create' I can create a new boot number. But this will only create another bootnumber for my Linux partition.
here is what hwinfo tells me about my diskdrive:
Hardware Class: disk Model: "Hitachi HTS72757" Vendor: "Hitachi" Device: "HTS72757" Revision: "JF4O" Driver: "ahci", "sd" Driver Modules: "ahci" Device File: /dev/sda Device Files: /dev/sda, /dev/disk/by-id/ata-Hitachi_HTS727575A9E364_J3340084HUZWHB, /dev/disk/by-id/scsi-SATA_Hitachi_HTS7275_J3340084HUZWHB, /dev/disk/by-id/wwn-0x5000cca68cd9e8ba, /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0 Device Number: block 8:0-8:15 BIOS id: 0x80 Drive status: no medium Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #29 (SATA controller)
This is a real problem for me, for I can't boot with a Live CD now.
So after a few hours of research google came up with the following results:
sudo efibootmgr --create --disk /dev/sda --part 1 --label "Precise - GRUB2" --loader \\EFI\\ubuntu\\grubx64.efi
of course I changed the given variables according to my system.
as "mount" told me I went on
sudo efibootmgr --create --disk /dev/sr0 --part 1 --label "Blueray" --loader \\EFI\\ubuntu\\grubx64.efi
but I only got back the error
Could not open disk /dev/sr0: Read-only file system
Well I guess the attempt to create a bootoption for my disk drive via efibootmgr is the wrong way. The --create command obviously is trying to write something to the diskdrive.
So I tried to tell grub that there is a disk drive:
sudo grub-install --bootloader-id CD-ROM /dev/sr0
I had a bootable Disk in my BRD-drive (tried two differend DVDs, both bootable on another system of mine). Before booting up the system from my Ubuntu partition the system seemed to check the DVD (I could hear the drive spinning at startup)
But the Ubuntu started as usual from the harddisk.
I just checked and saw that my command created this folder:
with another "grubx64.efi" like the one in
I opened up the file with the nano editor but the file seems to be encrypted in a way nano doesn't understand (only jibberish)
here a small excert so you know what I mean:
Has anybody an idea how I can restore the bootsequence to a standard value? Or how I can ad the blueray disk drive?