Hello I am trying to dual boot Ubuntu alongside windows 10. I have followed various online guides, created a partition and a bootable USB stick with Ubuntu 20.04 using Rufus. Most online guidelines ask you to disable secure boot and fast mood which makes sense to me. However I am then also asked to enable CSM support. My original OS is installed in EFI mode as far as I can tell and from what I have heard and seen installing Ubuntu in legacy mode can then create a whole range of problems. However, if I don’t have CSM support enabled my laptop (ASUS UX330UA) can’t find the bootable USB stick. Is there a workaround, so that I can install Ubuntu in EFI mode or do I have to reinstall windows using legacy mode? Any help much appreciated!
Possibly related info: Lenovo Legion-Y540. Windows was installed first. Ubuntu couldn't detect any other OS while installing using the .iso on a bootable USB device too.
Firstly, I literally have no idea about how Operating Systems work at lower levels and anything related to them. Plus, I have almost no experience in any sort of UNIX system. I have installed Ubuntu on my computer on a particular partition on my SSD, assuming that I could dual boot. Now I have this problem:
I have only 1 element in Boot Section for UEFI that is not Network related, which starts with "Windows Boot Manager". Fast start-up and secure boot are disabled.
If I boot my computer giving UEFI top priority, Windows boots and pressing shift wouldn't trigger GRUB.
If I boot my computer enabling Legacy Support and giving it's elements top priority, I can access either to GRUB or to Ubuntu, but on the list there's no Windows.
I need some insight, thanks!
I've built a custom iso based on Ubuntu 16.04 that boots in both UEFI and CSM (was originally CSM only). I'd like to have grub use the menu in isolinux.cfg. Is there a way to manage this or do I have to build a separate menu in grub.cfg? My isolinux.cfg follows:
PROMPT 0
TIMEOUT 75
DEFAULT menu.c32
F1 help.txt
MENU RESOLUTION 1024 768
MENU TABMSG [F1] help [Tab] options
# Dimensions configured for
MENU TITLE Foxclone
LABEL standard
MENU DEFAULT
MENU LABEL Start ^Foxclone
KERNEL /casper/vmlinuz
APPEND boot=casper initrd=/casper/initrd.lz vga=791 quiet splash --
TEXT HELP
If boot fails, reboot and try
selecting Safe Mode instead
ENDTEXT
LABEL safe
MENU LABEL ^Safe Mode
KERNEL /casper/vmlinuz
APPEND boot=casper initrd=/casper/initrd.lz xforcevesa nomodeset vga=ask toram --
TEXT HELP
Prompts for a video mode and
loads the USB image into RAM
ENDTEXT
LABEL check
MENU LABEL ^Check USB for defects
KERNEL /casper/vmlinuz
APPEND boot=casper integrity-check initrd=/casper/initrd.lz splash --
TEXT HELP
Verify integrity of USB drive
ENDTEXT
LABEL memtest
MENU LABEL ^Memory test
KERNEL /install/memtest
APPEND -
TEXT HELP
Check computer memory for errors
ENDTEXT
menu color screen 37;40 #80ffffff #00000000 std
menu color border 30;44 #40000000 #00000000 std
menu color title 1;36;44 #c00090f0 #00000000 std
menu color unsel 37;44 #90ffffff #00000000 std
menu color hotkey 1;37;44 #ffffffff #00000000 std
menu color sel 7;37;40 #e0000000 #20ff8000 all
menu color hotsel 1;7;37;40 #e0400000 #20ff8000 all
menu color disabled 1;30;44 #60cccccc #00000000 std
menu color scrollbar 30;44 #40000000 #00000000 std
menu color tabmsg 31;40 #90ffff00 #00000000 std
menu color cmdmark 1;36;40 #c000ffff #00000000 std
menu color cmdline 37;40 #c0ffffff #00000000 std
menu color pwdborder 30;47 #80ffffff #20ffffff std
menu color pwdheader 31;47 #80ff8080 #20ffffff std
menu color pwdentry 30;47 #80ffffff #20ffffff std
menu color timeout_msg 37;40 #80ffffff #00000000 std
menu color timeout 1;37;40 #c0ffffff #00000000 std
menu color help 37;40 #c0ffffff #00000000 std
menu color msg07 37;40 #90ffffff #00000000 std
Thanks in advance.
I have a 2019 ThinkPad X390 with Windows 10 and want to install Ubuntu. I have always used Legacy Boot previously, not UEFI, and want to see how to have that option. In the UEFI-BIOS, I can see that the option to change UEFI/Legacy Boot from UEFI Only to `Legacy Only' is not selectable and beside it is written the text
Unselectable for Kernel DMA Protection
How can the option to change this be enabled?
I have an Ubuntu USB stick and would like to be able to boot it from my UEFI laptop too (in addition to older BIOS devices). Currently, it is not shown in the list of bootable devices unless I enable the Compatibility Support Module. What do I have to change to make this work without?
I think I should add some kind of EFI folder into the boot partition, but I have no idea.
Edit: Ubuntu freezes on the startup screen and my Arch USB stick "can't access tty: job control turned off" so using CSM is not an option for me.