Questions tagged [boot]

Use this tag if you have trouble booting Ubuntu or you have questions about the bootup process.

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SGX error while booting kubuntu

I had updated Win 10 to Win 11 on 9th Oct, and dual booted Kubuntu 20.04.3 LTS on 16th oct but unfortunately on 15th Nov, exactly 30 days later Kubuntu fails to boot up and shows "SGX disabled by ...
Arijit Dutta's user avatar
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365 views

UEFI Boot not recognizing fresh Ubuntu Install from USB Stick

I've been reading through several forums to try and figure out how to get a fresh Ubuntu LTS install to be recognized on an HP desktop computer. The SSD is a NVMe.M2 hard drive. Basically I boot from ...
AuMogul's user avatar
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Unable to change brightness level Ubuntu 20.04 with grub settings nomodeset

I've installed ubuntu 20.04 and during installation because of issues I was facing related to acpi error I've resolved it by adding "nomodeset" after quick splash in command line. but now I'...
RandomLearner's user avatar
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Problems on booting Ubuntu 20.04

I am having a weird issue when booting on dual boot alongside Windows 10, the problem can be described as follows: Turn on the PC. The motherboard makes a weird sound when starting (it didn't happen ...
vendrick17's user avatar
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423 views

Ubuntu 21.10 hangs on shutdown/poweroff/reboot

I have research solutions for days now and I can't find the correct solutions e.g GRUB_CMDLINE_LINUX_DEFAULT "acpi=force" "nomodeset" but nothing is working. I also updated my ...
Frank Mendez's user avatar
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197 views

How to update ubuntu-20.04.3-preinstalled-server-armhf+raspi.img.xz to work with USB Boot?

Anyone know how to update the boot loaded on ubuntu-20.04.3-preinstalled-server-armhf+raspi.img.xz so it will work with USB boot? Or switch it to use u-boot? If I install & update from a SD card ...
Jeff's user avatar
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SOS! Cannot boot Ubuntu, emergency mode, pr.cpu0._pdc error

I just powered on my laptop, it said checkdisk is needed, but checkdisk stopped after about 30% and went into first picture's screen. After ctl -xb I faced several errors as in next pictures. I was ...
Masoud Borbor's user avatar
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476 views

How to fix an old ubuntu boot error (kernel panic) from new installed ubuntu

A few months ago I installed an Ubuntu 20.04.1 LTS on my laptop (ASUS K43sv ,SSD 128GB). suddenly it couldn't boot anymore. and unfortunately there are not any other versions of kernels to found out ...
SadeQ digitALLife's user avatar
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60 views

How do I make second disk in zpool bootable?

I have two M2 drives. The old one appears to be in pre-fail mode, so I am trying to migrate my system over to the new M2 drive. I have successfully created four partitions (boot, swap, bpool, rpool) ...
Brad's user avatar
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950 views

How to use systemd-boot instead of GRUB?

I have Kubuntu 21.10 installed and I want to use systemd-boot instead of GRUB. I am aware of another ask Ubuntu question but it does not mention anything about dkms modules. The original guide ...
td211's user avatar
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HP Pavilion Gaming Desktop Ubuntu bootable USB not working

I've been trying to replace Windows 10 with Ubuntu 21.10. But I've encountered so many problems. Basically, I followed a bunch of online tutorials and found out that I needed to create a bootable USB ...
sanalcopluk's user avatar
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383 views

DMAR Firmware bug on dead screen HP laptop

I am using an 99% dead screen old HP laptop running on ubuntu 20.04 with an external monitor. Today morning when I tried to boot my system, it shows an error- "DMAR: [Firmware Bug]: No firmware ...
Maruf Adnan's user avatar
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271 views

Ubuntu 20.04.3 boot suddenly started hanging

[EDIT: as there weren't any responses I eventually reinstalled and all is working now, so don't spend any time on this...] I’m struggling with getting my Ubuntu 20.04.3 machine (Ubuntu only, not dual ...
David Carter's user avatar
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1 answer
1k views

Want to make a custom Ubuntu bootable USB with a specific kernel

I have a Surface Pro 4 and want to try Ubuntu on it. I made a bootable USB using the website's instructions, and tried it on my Surface but I couldn't get the touchscreen or WiFi working, two things I ...
chimps123's user avatar
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5k views

Ubuntu stuck on blank screen with blinking cursor

I am running Windows 10, Ubuntu 20.04.2 dual boot on a Lenovo Thinkpad. The setup has been working fine for me for 6+ months. The laptop was on with the lid closed and the charging cable got ...
wyoumans's user avatar
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What to do after running fsck and messing up partitions?

Wasn't sure how to format the question in the title, but bear with me here. Earlier today, I (stupidly) ran fsck. Now, I get a kernel panic message (not syncing), and Ubuntu will not boot. After doing ...
Taco's user avatar
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1 answer
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Boot failure when powered via GPIO with UART connection to PIXHAWK 4 MINI

I have a Raspberry Pi 4 4GB and connected to my PixHawk 4 Mini via UART. If I power the Raspberry PI via the USB-C port, it boots and I have good communication to the flight controller via the UART, ...
Eric Slaghuis's user avatar
1 vote
1 answer
1k views

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 ...
DonP's user avatar
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Mount a ubuntu portable machine as a hard drive on another ubuntu portable

For those that know Mac OS, I am looking for a way to replicate the Target mount mode in Ubuntu. Mac target mode is a startup mode that presents a firewire / usbc connected machine as a hard drive to ...
Christopher Lowden's user avatar
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Showing both Windows installations in grub (single Windows EFI partition)

I hope this is the right place to ask this question! I have a machine in which I have three OSs installed: two Windows 10 and Ubuntu. The two windows 10 systems have been installed on the same drive, ...
HitLuca's user avatar
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How to force degraded mdadm raid1 array to start and mount on boot?

How do I force raid1 array(neither root, nor boot) without all components present from failing to start on system boot? I am using Ubuntu 21.10. File system used is ext4. Expected behavior Install a ...
Raja Guha's user avatar
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3k views

dhcp client doesn't start on boot

I am using ubuntu 20.04 desktop and one day after booting up my PC, without me touching anything, the internet wasn't working. So after about an hour of frustration I found the magic commad that fixed ...
Askerman's user avatar
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How to get more space on /boot? (extra kernels have been removed)

i'm on ubuntu 21.04 trying to update to 21.10, and getting the usual error The upgrade has aborted. The upgrade needs a total of 287 M free space on disk '/boot'. Please free at least an additional ...
ludant's user avatar
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2 answers
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ucsi_acpi USBC000:00: usci_handle_connector_change: GET_CONNECTOR_STATUS failed (-110)

On boot the following message appears and I cannot login (well I can but only if I go to tty3 and login via cli): ucsi_acpi USBC000:00: usci_handle_connector_change: GET_CONNECTOR_STATUS failed (-110) ...
Charlie's user avatar
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1 answer
137 views

Slow Boot on Ubuntu 20.04 LTS

I upgraded from a previous version of Ubuntu to 20.4 LTS and the boot up takes minutes when it used to take seconds. I get a lot of acpi errors but suspect these are a red herring. Instead it ...
deesea65's user avatar
1 vote
1 answer
383 views

Upgrade a working 21.04 installation to 21.10 resulted in a useless purple screen

I upgraded my fully functional ubuntu 21.04 installation to 21.10, and the result was a useless blank purple Ubuntu screen. Rebooting just results in the same thing. There is nothing I can do, not ...
R. E. Dunbar's user avatar
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0 answers
1k views

ubuntu install stuck on "detecting file systems"

i've been trying to dual boot ubuntu and windows 10 but every ubuntu install i've tried leads to the same problem which is getting stuck on "detecting file systems". i'm using an external ...
plain_jane's user avatar
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194 views

Why doesn't my trackpad \ touchpad work on my USB boot of Ubuntu?

I created a bootable flash drive to run Ubuntu on as I have a pretty old laptop with an extremely small hard drive. I had now problems getting it to boot up, but my trackpad (mouse) isn't operational. ...
Joseph Radtke's user avatar
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1k views

Tried to Dual Boot Windows 11 and Ubuntu 21.04

I was originally trying to install Ubuntu on a USB drive, but then I decided just to dual-boot it. Ubuntu told me to disable Intel RST, so I followed the steps in this guide until I got to the ...
Marcus Jones's user avatar
1 vote
0 answers
453 views

Ubuntu Server 20.04 not booting up

I'm trying to install Ubuntu Server 20.04 on my old PC, and it fails booting up every time. I'm using a USB as an installation media, and after removing the USB from the PC, it fails to boot up Ubuntu....
tony00324's user avatar
1 vote
0 answers
2k views

update-initramfs: failed

Recently I restored accidentally deleted /share folder of Ubuntu-21.04 by copying it from a live Ubuntu-21.04, and somehow managed to start the computer. Since then Computer is working fine, but ...
Schrodinger's user avatar
1 vote
1 answer
2k views

Install Ubuntu onto an external SSD using VirtualBox?

So, I have a 240GB (external)SSD, onto which I'd like to install Ubuntu. Now, after reading a few posts on doing exactly this, I see that one of the common issues people face while doing this is that ...
n0pe's user avatar
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1 vote
0 answers
896 views

How do I revert back to a previous update of ubuntu

The most recent automatic update of Ubuntu was faulty. My computer just displays a blank screen and an occasionally flashing cursor. Now, in order to boot Ubuntu, when grub comes up,I have to select ...
Steven Trott's user avatar
1 vote
0 answers
45 views

Error when starting Ubuntu from usb

Recently I have installed Ubuntu on a usb. I booted it a few times, and it worked well, but when I tried to boot it today, it gave me this error: When I hit ctrl+alt+delete it shows the ubuntu logo ...
Angry Carpet's user avatar
1 vote
1 answer
348 views

Cannot start because of volume group issue

I'm not sure if this was caused by hibernate, or a system update, or a combination. I cannot start anything graphical on my ThinkPad X1 Carbon anymore. I can start in text mode, if I stop the Lenovo ...
Gauthier's user avatar
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1 vote
0 answers
185 views

Ubuntu laptop won't turn on without external monitor

I have my ubuntu mate set up with an external screen, keyboard, and mouse (total of three, plus an external harddrive occasionally) when working from home, but when we traveled recently I noticed that ...
Cypress's user avatar
  • 60
1 vote
1 answer
561 views

Ubuntu install with mdadm and multiple luks partitions

Given 3 identical drives partitioned for an ubuntu 20.04 install as follows (swap and /home are on separate luks volumes to share with another Linux install on sda3/4) Partition Format Mount Point /...
fedora's user avatar
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370 views

Ubuntu 20.04 is freezing every login, what can I do to diagnose?

The hardware all passes the dell diagnostics and the SMART check on the hard disk. The laptop is freezing randomly, sometimes at the disk decryption screen, sometimes after 10 minutes of logging in, ...
KinsDotNet's user avatar
1 vote
0 answers
467 views

Cannot boot Xen: secureboot forbids loading multiboot2 module

I've installed xen-hypervisor-4.11-amd64, now I wish to boot Xen. I can't. When I choose corresponding entry from grub I receive following message: Loading Xen 4.11-amd64 error: Secure boot ...
lovelinux's user avatar
1 vote
0 answers
234 views

System shuts off randomly when booting Ubuntu

I have a C246 mainboard with a Xeon CPU and ECC RAM. Using Ubuntu 20.04, the system randomly shuts off completely, as if power was lost. At first, I suspected a HW problem. I switched the PSU, I ...
Joseph Dalton's user avatar
1 vote
0 answers
204 views

BLACK SCREEN Aftern installing new GPU on Ubuntu 20.04 new pc

Recently I decided to upgrade my Desktop PC, so I bought a few things to try a new setup. I also decided to keep my 2 hard drives, 1 SSD in which Ubuntu 20.04 is installed, and 1 HDD which I use for ...
Grot_6's user avatar
  • 11
1 vote
0 answers
48 views

Console doesn't open automatically

After Ubuntu installation I enabled system boot in a console mode using the following command: systemctl set-default multi-user.target It have always worked fine but yesterday console stopped to ...
Sogawa-sps's user avatar
1 vote
1 answer
2k views

Having to set root and prefix every time I boot on grub 2 "minimal bash like editing"

I tried the alternative method shown here using boot-repair after the system didn't detect at all the linux bootloader (only windows option and the disc only (which I don't know why it appears) were ...
Tom's user avatar
  • 11
1 vote
0 answers
312 views

When running version 20.04.3 LTS via /boot/vmlinuz-5.11.0-27-generic I get a black screen

Today I updated my Ubuntu 20.04.2 to version 20.04.3 and got a black screen, under which I hear the sound of volume up sliders. My EFI partition is banned in the disk management application. Later, I ...
user avatar
1 vote
1 answer
99 views

Duplicate Ubuntu entries in BIOS

After installing software update, there are two entries for Ubuntu in BIOS. I'm using both Windows 10 and Ubuntu 20.04 on dual boot. Removing them from efibootmgr didn't work.
user1423370's user avatar
1 vote
1 answer
2k views

"you are in emergency mode" during first boot after power failure - how to avoid it?

For a few years I'm running Ubuntu on my home server. New thing this year in my area are short but frequent power grid outages. After each such power failure my system is not booting to desktop, but ...
Bronislaw Wstep's user avatar
1 vote
0 answers
38 views

Full USB installation isn't booting anymore

I installed Ubuntu permanently on a 256 GB USB drive. In order to boot it, I simply hit F12 during boot and selected the USB drive. This has been working fine for at least 2 years, but now I just get ...
Chris's user avatar
  • 21
1 vote
0 answers
511 views

Initramfs unpacking failed: no cpio magic booting 20.04.3

I was trying to fix an issue and after rebooting I got stuck on the following screen. Initramfs unpacking failed: no cpio magic Failed to execute /init (error -2) Kernel panic ~ not syncing - No ...
George Smith's user avatar
1 vote
0 answers
217 views

Can't boot ubuntu after update, black screen

English isn't my first language, So I will try my best to convey the problem, I performed an update in terminal I did the following sudo apt-update sudo apt-upgrade sudo apt autoremove sudo apt ...
Lucas's user avatar
  • 13
1 vote
1 answer
414 views

Lenovo T490 shut down and will not boot into Ubuntu without using grub2 bootloader from USB

There is a boot loader issue for many Lenovo laptops. I do not know why. Specifically this laptop was stuck trying to PXE boot as seen by many IT professionals. After messing around a bit, I created a ...
Anthony O's user avatar
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