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Questions tagged [csm]

The Compatibility Support Module (CSM) provides legacy BIOS compatibility in most UEFI firmware implementations on PC-class machines that also support booting in legacy BIOS mode from MBR-partitioned disks

To ensure backward compatibility, most UEFI firmware implementations on PC-class machines also support booting in legacy BIOS mode from MBR-partitioned disks, through the Compatibility Support Module (CSM) that provides legacy BIOS compatibility.

15 questions
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How can Legacy Boot be enabled on a 2019 ThinkPad?

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…
BlandCorporation
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Cloning a Ubuntu installation (including repositories, held packages & keys)

From How to list all installed packages we learn how to backup list of installed packages. From How to See list of Repository? we learn how to backup list of installed repositories. But how do we automatically add all repositories before we run a…
WinEunuuchs2Unix
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Ubuntu 17.04 will not boot after installing on UEFI laptop

I wanted to wipe Windows 10 off my laptop and just have Ubuntu on it. I had heard that it was safe to install it on UEFI hardware so I just went through the standard install and told Ubuntu to erase everything and install Ubuntu. Once it…
E. Carr
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ISO Linux 6.03 error booting Live USB

When booting from a Live USB I'm getting an ISO Linux Error immediately after BIOS POST (Basic Input Output System Power On Self Test): ISOLINUX 6.03 20160618 EHDD Copyright (c) 1994-2014 H. Peter Anvin et al Loading bootlogo... bootlogo: invalid…
WinEunuuchs2Unix
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Boot Issues After 21.10 Upgrade

After upgrading one of my Ubuntu systems to 21.10, it now boots only to the BIOS. It appears to be a UEFI issue which is what I believe in my BIOS is called CSM boot mode which is enabled. In order to boot, I needed to create a USB boot as the DVD I…
DonP
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Installing Ubuntu alongside Windows 10 on an ASUS UX330UA

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…
Jakobb2000
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Make Ubuntu USB Stick boot UEFI without CSM

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…
piegames
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What is a UEFI bootable Ubuntu USB?

Previously I have a Ubuntu 16.04 live USB. Now I have a new computer with Windows 10 installed. Since it uses UEFI firmware, I also have to install Ubuntu in UEFI mode. Do I need an UEFI bootable Ubuntu 16.04 live USB? Is my previous live USB not…
Y.S.
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Laptop can‘t boot my Drive

i am trying to install Ubuntu 18.04.06 on my Laptop (Lenovo ideapad 450u) on a 200gb ssd. The installation works without any Problems, but once the Installation is finished, and i try to boot the drive, it doesn‘t appear in the boot menue (CSM Bios,…
Andre Gaming
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GRUB menu does not appear

I have a similar problem like this previous post. So, I am using ASUS motherboard desktop. Previously the OS was Windows 10, very probably in UEFI mode, I did not check that, and that was my worst mistake. Recently I installed Ubuntu 22.04 LTS on it…
bim
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Recover Grub dual boot UEFI Windows 8 + CSM installed Lubuntu 20.04

I have an old Toshiba Satellite C855D-S5105. It has the original Windows 8. I have just installed dual booting Lubuntu on it, selecting "Something Else" during installation. To be able to boot the installation disk, I had to change boot from UEFI to…
sancho.s ReinstateMonicaCellio
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Cannot detect either GRUB in UEFI, or Windows in GRUB if booted in Legacy

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…
My name is name
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How to tell grub.cfg to use isolinux.cfg menu

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…
larry78723
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How to Install Single Boot Ubuntu 18.04 on a MacbookAir3,1?

I want to install Ubuntu 18.04 as the single OS on a MacbookAir3,1. In addition, I'd like to use the proprietary graphics drivers, but there are some known issues with that. I attempted to run the install while booted from USB drive, but the…
Dylan Kinnett
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Can't boot Lubuntu 64-bit without UEFI-CSM support

I have a thin client Wyse D90D7. It can't boot Lubuntu and any other linux distro 64-bit that doesn't have UEFI-CSM. it always get stuck on black screen without error. Installing 32-bit is not an option because some softwares I use no longer support…
0xabc
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