RE: Grub rescue> need HELP! 06-10-2013, 05:21 PM
#8
Ok so i've fixed it now...i can make detailed tutorial abou this case...so if your laptop hibernates cuz of loss of batter,your BIOS gonna stuck in "hibernate mode" and try to get you system back asap when you charge AC...so if your grub or mbr are damaged there is no way to boot any bootable CD/DVD or USB....simply you cant do nothing....
If you're enough lucky to keep grub patrition and modules in grub rescue you can fix it very easy by typing
ls
ls (hdX,Y) - find where your ubuntu or backtrack is installed cuz there is always in /usr/lib/grub/i386-pc grub modules in case you gonna miss them
set root=(hdX,Y)
set prefix=(hdX,Y)/root/grub
insmod normal/linux/ntfs/fat/ntfscomp
so there you set the partition where your grub modules are atm,so basicaly with insmod you gonna run them(pick one of the normal/linux/ntfs/fat/ntfscomp....normal- normal boot linux-linux boot ntfs-partition format to perform scan fat-same like ntf etc...
usually this problem is caused by missing atleast one partition (deleted BT partition,win7 etc.)
if you remove grub partition you can simply boot live cd and fix it...
but if your system hibernates after removing partition of grub you're fucked up as hell...
so here is explanation why it happens:
hibernate state, S4, does not fully turn off power to the machine. Yes, the computer looks completely off, no lights or sounds, and even a firmware loading screen is presented on “power on”, but it is sucking tiny bit of energy (see ACPI spec v5 16.1.4). Somewhere, maybe in some modified ACPI tables but I’m not sure, windows hibernate tells the firmware to just boot directly to the device window hibernated to.
how to fix it...1
if you're happy enough to turn of your laptop and plug off AC adapter and battery, by pressing "power on" button all electric charge will be spent all the power
2.) you can disassemble your laptop and find CMOS battery (battery which saves the bios job,and state (the one you want to remove all electric charge under 1)))...so you have to remove it and w8 10 sec the put i back and everything gonna work just fine
3.) you can swap your hardrives to another PC and boot linux,or windows repair and bootrec.exe /fixmbr /fixroot for windows and sudo apt-get remove grub sudo apt-get install grub and update it....
i swaped HDD to my brothers laptop and fixed it....huh so im pretty lucky cuz i have another laptop to fix it,otherwise i would have to search CMOS batter for a life...
thanks for help guys
If you're enough lucky to keep grub patrition and modules in grub rescue you can fix it very easy by typing
ls
ls (hdX,Y) - find where your ubuntu or backtrack is installed cuz there is always in /usr/lib/grub/i386-pc grub modules in case you gonna miss them
set root=(hdX,Y)
set prefix=(hdX,Y)/root/grub
insmod normal/linux/ntfs/fat/ntfscomp
so there you set the partition where your grub modules are atm,so basicaly with insmod you gonna run them(pick one of the normal/linux/ntfs/fat/ntfscomp....normal- normal boot linux-linux boot ntfs-partition format to perform scan fat-same like ntf etc...
usually this problem is caused by missing atleast one partition (deleted BT partition,win7 etc.)
if you remove grub partition you can simply boot live cd and fix it...
but if your system hibernates after removing partition of grub you're fucked up as hell...
so here is explanation why it happens:
hibernate state, S4, does not fully turn off power to the machine. Yes, the computer looks completely off, no lights or sounds, and even a firmware loading screen is presented on “power on”, but it is sucking tiny bit of energy (see ACPI spec v5 16.1.4). Somewhere, maybe in some modified ACPI tables but I’m not sure, windows hibernate tells the firmware to just boot directly to the device window hibernated to.
how to fix it...1
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2.) you can disassemble your laptop and find CMOS battery (battery which saves the bios job,and state (the one you want to remove all electric charge under 1)))...so you have to remove it and w8 10 sec the put i back and everything gonna work just fine
3.) you can swap your hardrives to another PC and boot linux,or windows repair and bootrec.exe /fixmbr /fixroot for windows and sudo apt-get remove grub sudo apt-get install grub and update it....
i swaped HDD to my brothers laptop and fixed it....huh so im pretty lucky cuz i have another laptop to fix it,otherwise i would have to search CMOS batter for a life...
thanks for help guys
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