grub2

Where does cryptomount in Grub create decrypted disks

Where does cryptomount in Grub create decrypted disks The documentation contains: Successfully decrypted disks are named as (cryptoX) and have increasing numeration suffix for each new decrypted disk. If the encrypted disk hosts some higher level of abstraction (like LVM2 or MDRAID) it will be created under a separate device namespace in addition to the …

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Why is my BIOS not detecting the hard drive where is Ubuntu installed?

Why is my BIOS not detecting the hard drive where is Ubuntu installed? I have an acer travel mate laptop with windows and I wanted to also have Ubuntu, so I downloaded the 22.04.3 image and used rufus to make a booteable USB. Then I proceed with the instalation in one of my hard drives, …

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GRUB_TIMEOUT=3 # Ignored?

GRUB_TIMEOUT=3 # Ignored? Newly installed Ubuntu 24.04, I’m in the process of adapting it to my liking… One thing is to delay minimally at the grub menu, though always show it. Hope the info below can tell what might be wrong, as this should set it to delay at grub menu in 3 seconds, but …

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BadRAM Range: cannot set up the right range

BadRAM Range: cannot set up the right range I think my MacBook with soldered RAM has a RAM issue.  With memtest86+, I figured out which BadRAM pattern I have, but I cannot interpret the result correctly.  How should I read the range to set up the right exclusion in GRUB? Here are my memtest results: BadRAM Patterns ————— badram=0x0000000058cb4000,0xfffffffffffffc00, …

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/boot/grub/grub.cfg is read protected for regular users. Why?

/boot/grub/grub.cfg is read protected for regular users. Why? I was wondering why the file /boot/grub/grub.cfg is read protected. The only thing that comes to my mind is because it can contain a hash of a password if I use grub with a passwd. I am however not using that feature, and hence I do not …

Total answers: 2

Is it worth booting another OS via grub if they live on different drives?

Is it worth booting another OS via grub if they live on different drives? Foreword This is technically not a Ubuntu-specific question but I suspect it’s a valid question for Ubuntu users. Actual question Is it really worth booting a non-Ubuntu OS via grub, if it lives on a different physical drive than Ubuntu? Context …

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blank screen after ipv6.disable=1 removal from grub cmdline

blank screen after ipv6.disable=1 removal from grub cmdline I want to re-enable IPv6 on my system which is currently disabled in GRUB directly. But if I remove ipv6.disable=1, I then get a blank (backlit) screen. It took me tonight to figure out that I have a timeshift backup of OS (Linux Mint 21.3), I have …

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Grub PXE boot – not looking for MAC/IP-based config

Grub PXE boot – not looking for MAC/IP-based config I am PXE-booting an Ubuntu 22.04 installation. For the grub image, I am using the one here . According to the docs: GRUB will search for its configuration files in order using the following rules where the appended value corresponds to a value on the client …

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Ultrawide GRUB slowness

Ultrawide GRUB slowness I’m using 22.04 with a Dell 34 inch ultrawide monitor (S3424DWC) connected to an NVIDIA 3080 by HDMI. Here are all my installed GRUB versions (although probably unnecessary as they are all from the default 22.04 install): ii grub-common 2.06-2ubuntu7.2 amd64 GRand Unified Bootloader (common files) ii grub-efi-amd64-bin 2.06-2ubuntu14.4 amd64 GRand Unified …

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How do I permanently recover from grub rescue?

How do I permanently recover from grub rescue? This question relates to a Windows/Linux dual boot system on a DOS-partitioned SSD (i.e. none with GPT/UEFI). Originally, the computer only had Windows 10 on an HDD. Then I managed to transfer this system to the SSD, resize the partitions and install Xubuntu 20.04 alongside Windows 10, …

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Failed to enable BPF LSM when booting in Ubuntu 20.04

Failed to enable BPF LSM when booting in Ubuntu 20.04 I want to enable the BPF LSM, I have added lsm=lockdown,capability,yama,apparmor,bpf to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub, and run update-grub. After rebooting, it still displays lockdown,capability,yama,apparmor for cat /sys/kernel/security/lsm. The cat /proc/cmdline displays BOOT_IMAGE=/boot/vmlinuz-5.8.0-48-generic root=UUID=a94e991b-4a4b-42ae-9729-ef5199478c48 ro debian-installer/custom-installation=/custom find_preseed=/preseed.cfg auto preseed/file=/floppy/preseed.cfg automatic-ubiquity noprompt priority=critical locale=en_US console-setup/modelcode=evdev lsm=lockdown,capability,yama,apparmor,bpf My …

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Grub not detected after Kubuntu install

Grub not detected after Kubuntu install I have a pc with an MSI B550 Gaming Plus motherboard, with Windows 10 on it. After trying to install Kubuntu with different ways to partition the SSD (install windows using the whole disc and have Kubuntu resize it, install windows on part of the disc and manually make …

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Dual-boot windows and Ubuntu

Dual-boot windows and Ubuntu I have Ubuntu on SSD, use it as my main OS, but want to install win10 on separate SSD for gaming and to learn how to do it:) Need some help (good videos/articles/guides/solved question) to do it properly with GRUB and etc. I don`t want to reinstall Ubuntu and don`t have …

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Ubuntu Server 22.04 wrong screen resolution except in recovery mode

Ubuntu Server 22.04 wrong screen resolution except in recovery mode When I log in locally to Ubuntu Server 22.04 (i.e. with screen, keyboard etc attached) the system is using a screen depth about 8 lines more than the display can handle, so these line aren’t visible until they roll into view. This makes things pretty …

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Can't boot into Ubuntu installation

Can't boot into Ubuntu installation First of all, I’d like to say that I am a complete Linux newbie. I am trying to dual boot Linux and Windows 10. My Setup is: Ryzen 5600 Gigabyte B450M DS3H V2 (BIOS version: F64) RTX 2060 Super (Driver version: 546.29) 16GB DDR4 RAM 500GB M.2 NVMe (200GB Free) …

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_[SOLVED]_ grub doesn't show the option for encrypted partition

_[SOLVED]_ grub doesn't show the option for encrypted partition I installed ubuntu 22.04 LTS with the root partition encrypted. Now grub only allows me to boot my old (non-encrypted) ubuntu installation. how can I re-install grub so that it allows me to boot my current installation? Thank you PS: Is it possible to speed up …

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Keyboard not working in GRUB

Keyboard not working in GRUB I have an MSI all-in-one PC with windows 10 and ubuntu. Usually I would start it up and go to ubuntu booting page and I had configured it in a way so that if I don’t select any options after 3 seconds it would start the first option which was …

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Booting from a live USB fails: cyclic rebooting

Booting from a live USB fails: cyclic rebooting I faced a rather odd problem. It’s a relatively new computer (built in September). Back then, I installed Ubuntu 22.04 (now running 6.3.13). Windows is running in parallel, with refInd as the boot loader. Recently, I needed to boot into a live USB and I could not …

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