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I was dual booting winodws 8.1 and ubuntu 13.10. I have updated my windows BIOS. After that i am always getting into windows. GRUB menu is not displayed.

So, Using UBUNTU 12.10 live CD (But i have 13.10 in my lap), i have repaired the boot to fix this issue.

When i clicked Boot repair, it says "UEFI is detected" I have choosen the recommended repair and it ends up with some commands

sudo chroot "/mnt/boot-sav/sda7" dpkg --configure -a
sudo chroot "/mnt/boot-sav/sda7" apt-get install -fy
sudo chroot "/mnt/boot-sav/sda7" apt-get purge -y --force-yes grub*shim-signed linux-signed*

After that, On clicking forward in the boot repair, got some error message like "GRUB is still present. Please try again"

PASTEBIN Ref: http://paste.ubuntu.com/7164372/

BIOS Settings: Secured Boot: Disabled OS Type: UEFI

Kindly help guys.

Thanks

share|improve this question
    
It looks like it may have purged the signed UEFI grub & kernels which are only required if you have secure boot on. If you go into UEFI can you not choose to boot ubuntu entry or with one time boot key boot ubuntu entry? With 8.1 you cannot boot Windows from grub if secure boot is on, some new 'feature' in 8.1 that grub does not yet have a work around for. –  oldfred Mar 27 at 19:49
    
@oldfred thanks for the quick reply. BTW, i have disabled the secured Boot from the BIOS. I was dualbooting without any problem for along,only after updating the BIOS i was getting this problem. can you please let me know whether advanced boot repair(help.ubuntu.com/community/Boot-Repair) or this link - askubuntu.com/questions/88384/… helps? –  Cyborgz Mar 27 at 19:53
    
Your BootInfo report showed a grub installed to gpt's protective MBR for BIOS boot. Did you somehow convert back to trying to boot in BIOS mode which would not work once changed to UEFI boot. And since Windows is UEFI you want Ubuntu in UEFI boot mode. –  oldfred Mar 27 at 20:06
    
@oldfred. I have configured Secured Boot -> Disabled and OS Mode Selection -> UEFI. When tried to select Ubuntu as boot priority,always greeted with "unknown file system . Grub Resue" message got displayed. is live CD version need to be same as ubuntu installed in lap? cos,am using 12.10 in cd wheres 13.10 installed in lap. please help me out. i am totally stucked up. :( –  Cyborgz Mar 27 at 20:13
    
It is better to always have repair (Windows) or live version (Ubuntu) CD or flash drives that is same version as install. Always update repair flash drives if you upgrade. But Boot-Repair often chroots into your system and downloads from correct repository, so it may work. If system is so new as to have Windows 8.1, you may be better off with 14.04, but it will not be official for another couple of weeks. Some are reporting good results with those very new UEFI hardware systems. –  oldfred Mar 28 at 0:44

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