Remove uefi boot entry 15.04
Recently installed 15.04 and loving it, however I tried out opensuse and did not care for it. So I went and uninstalled it. However it left opensuse-secure boot uefi as an option in my boot order in my uefi bios. Wth? How do I remove this? Any programs in Kubuntu 15.04 that could do the trick?
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I presume you already tried re-booting a couple times to see if your UEFI firmware setup would not detect it and maybe remove it, maybe, sort of.
Open your Konsole terminal (K > Applications > System > Terminal (Konsole)).
Type
sudo efibootmgr
to see your BootOrder setup (as reported by your UEFI firmware).
The program efibootmgr should be installed already since you have a UEFI installation of Kubuntu, but it can always be installed using your Muon Package Manager or by sudo apt-get install efibootmgr.
Now see the man page for efibootmgr to learn how to delete that one, single boot variable for OpenSuse -- be careful not to delete a whole bunch of stuff unless you are certain what you are deleting.
So, at Konsole, type
man efibootmgr
and read through that man page until you come to deleting entries -- there are examples at the very end of that man page, too.
Numbering: If a boot variable is 0005, for example, you can call it 0005 or usually get by calling it just 5 in the efibootmgr commands. To be safe, I usually try to just write it out as 0005, but both methods seem to work OK.Last edited by Qqmike; Aug 13, 2015, 05:56 AM.An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles Bukowski -
Hm, so I typed in efibootmgr -b 0003 -B, 0003 would be where that opensuse entry was located. The response I get from the terminal is "EFI variables are not supported on this system.". Yes I did install by using sudo apt-get install efibootmgr in the terminal as well.Comment
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What do you get when you run the command
sudo efibootmgr
?An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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Same thing "EFI variables are not supported on this system." Now here is my guess, when I installed Kubuntu I just went with the the standard install from my usb drive, not the UEFI verison. Something to do with it perhaps?
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Yep. Sounds like you may have a standard BIOS+MBR installation of Kubuntu, not a UEFI installation.
UEFI require the 64-bit version of Kubuntu AND when you re-boot the computer you must enter the firmware UEFI setup menus and select the Kubuntu USB that indicates EFI/UEFI in its description.An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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(As you may know) if you are seeing things in the GRUB boot menu that you'd rather not see (like an entry for OpenSuse), you can boot into your Kubuntu and issue these commands:
sudo grub-install
sudo update-grub
and that should clean things up and refresh things (w/GRUB).An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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In case I'm away from my computer for awhile, and fwiw, future reference:
UEFI for Kubuntu--simplified ... and some dual-booting tips for Kubuntu
https://www.kubuntuforums.net/showth...l=1#post373198An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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Well worked like a charm
thank you again, that was really driving me crazy. Also one other question, before the system boots into Kubuntu it says it is booting in unsecure mode. So that is completely normal correct?
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Yes, it is OK to see that message: booting in insecure mode. It just means that you have Secure Boot turned off (in your UEFI setup menus). It is OK to have Secure Boot turned off, I have mine turned off, and most experts I've read also advise turning it off (it can complicate certain things, and it may have little benefit).An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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Your setup right now is OK: Kubuntu booting in BIOS mode (on a UEFI machine) -- no problem. If you ever do decide to install Kubuntu in UEFI mode, it's a good idea to partition your hard drive using the newer GPT scheme. Use GParted Live CD to make a new GPT for you, then make your partitions (including an ESP), then install Kubuntu in UEFI mode. (You might check that how-to I linked to above, first.)An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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I actually did a reinstall of Kubuntu using UEFI option instead, to even get that fix to work. I didn't mind starting over.Comment
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Now this should work:
sudo efibootmgr
Also, gdisk should show whether you have a MBR or a GPT scheme on your disk.
If you want to mess with this .......
You usually have to install gdisk using Muon Package Manager, or by
sudo apt-get install gdisk
Then, to use it to see your HDD:
sudo gdisk -l /dev/sda
(or sdb or sdc, whatever your disk is).
Example:
Code:sudo gdisk -l /dev/sda GPT fdisk (gdisk) version 0.8.8 Partition table scan: MBR: protective BSD: not present APM: not present [B][COLOR=#ff0000]GPT: present[/COLOR][/B] Found valid GPT with protective MBR; using GPT. Disk /dev/sda: 976773168 sectors, 465.8 GiB Logical sector size: 512 bytes Disk identifier (GUID): D3B766B4-D998-4351-8F06-13BC87F55BDE Partition table holds up to 128 entries First usable sector is 34, last usable sector is 976773134 Partitions will be aligned on 2048-sector boundaries Total free space is 111493101 sectors (53.2 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 1026047 500.0 MiB [B][COLOR=#ff0000]EF00 <-- this is an ESP[/COLOR][/B] 2 1026048 62466047 29.3 GiB 8300 3 62466048 267266047 97.7 GiB 8300 4 267266048 300034047 15.6 GiB 8200 5 300034048 361474047 29.3 GiB 8300 6 361474048 566274047 97.7 GiB 8300 7 566274048 567298047 500.0 MiB EF00 8 567298048 669698047 48.8 GiB 8300 9 669698048 772098047 48.8 GiB 8300 10 772098048 773122047 500.0 MiB EF00 11 773122048 824322047 24.4 GiB 8300 12 824322048 865282047 19.5 GiB 8300
An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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Another example:
Code:sudo efibootmgr BootCurrent: 0000 Timeout: 1 seconds BootOrder: [B][COLOR=#ff0000]0000[/COLOR][/B],0003,0001,0004,000A,0005,0006,0002,000B,000C,0007,0008,0009 [B][COLOR=#ff0000]Boot0000* ubuntu <-- this is actually Kubuntu, first in the UEFI BootOrder[/COLOR][/B] Boot0001* debian Boot0002* grub_sda5K1504 Boot0003* rEFInd Boot Manager Boot0004* Mint_2 Boot0005* Hard Drive Boot0006* CD/DVD Drive Boot0007* UEFI:CD/DVD Drive Boot0008* UEFI:Removable Device Boot0009* UEFI:Network Device Boot000A* Mint_1 Boot000B* ubuntu Boot000C* ubuntu
An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles BukowskiComment
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