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BOOT Ubuntu 12.04.3 in UEFI mode

rated 0 times [ 1] [ 0] / answers: 1 / hits: 2584 / 1 Year ago, wed, november 30, 2022, 10:40:10

I have installed ubuntu on my pc (sony vaio pro 13) in uefi mode and the installation completed without any problem. After that when I restart the system does not boot ubuntu so I tried with boot-repair that told me that has fixed the boot successfully, but at the restart again ubuntu does not boot. This is the output of boot-repair http://pastebin.ubuntu.com/6196773/ , if someone can hekp me i'll be greatfull because i do not know what to do at the moment!!!
thank you

Claudio

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rinstracte

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2 Years ago

answered 1 Year ago arsleyeuth · Accepted Answer

Your installation is not a typical EFI-mode installation. You do have an EFI-mode version of GRUB installed on /dev/sdb5; however, your fdisk output indicates that your disk is partitioned using the MBR system, whereas EFI installations almost always use GPT, and /dev/sdb5 is marked in the MBR as a Linux partition, not as an EFI System Partition (ESP; the type of partition that holds EFI boot loaders). As 12.04.3 is fairly new, it could be that you've run into a new bug (or set of bugs) in its installer.

I suggest you try the following:

Using fdisk, change the type code on /dev/sdb5 (or /dev/sda5, if the disks change identities) from 0x83 to 0xEF.

Reboot. If it boots to Linux, declare victory and ignore the following steps.

Boot the System Rescue CD. (You could use an Ubuntu live CD/DVD, but that will require you to install gdisk, which was awkward from the Ubuntu live CDs/DVDs, the last time I checked.)

Launch gdisk on /dev/sdb. Type p to verify you've got the right disk, then type w to save the partition table. This should convert the disk from MBR to GPT form. See this page of the gdisk documentation for more on this procedure.

Reboot. If it boots to Linux, declare victory and ignore the following steps.

Re-run Boot Repair.

Reboot. If it boots to Linux, declare victory and ignore the following steps.

Download and prepare the CD-R or USB flash drive version of my rEFInd boot manager.

Boot using the rEFInd medium. You should see a rEFInd menu showing three Linux entries, each of which should boot Linux using a different kernel.

Try each of the kernels until one boots successfully. If none boot, post back with details.

If you can get Linux booted via the external rEFInd medium, install the rEFInd Debian package, remove the external medium, and reboot.

If you can boot with rEFInd installed on your hard disk, declare victory. If not, run the Boot Info Script, post the RESULTS.txt file that it creates to a pastebin site, and post back for more help (including the URL to your RESULTS.txt file).