Bigger doesn't matter: Grub will then automatically scale it back to fit your display. png files might also be suitable, but I haven't tried those myself).Ĭhoose a picture that offers enough contrast for white letters, because the boot lines in Grub will have thin white letters!įurthermore, the picture should be at least as big as the resolution of your display. Now choose the picture that you want for background. In Mint this has changed: you'll see asterisks when you type. In Ubuntu this remains entirely invisible, not even dots will show when you type it, that's normal. Sudo apt-get remove grub2-theme-mint grub2-theme-mint-2k (You can launch a terminal window like this: *Click*) Like this you can ensure that the Grub of Linux Mint doesn't deviate from the Ubuntu version that it's built on: In Linux Mint you need to make sure that you don't have the Mint theme package installed for the Grub menu, because that would thwart the procedure outlined below.
Linux Mint only: remove the Mint theme package for the Grub menuġ.1. Configure Grub to use the right resolution and show bigger textġ.The normal procedure should work in most cases, so proceed like this: Option: better readable text colour in the Grub menu Linux Mint only: remove the Mint theme package for the Grub menu Also, most probably other distros affected by these issues will also publish updated GRUB2 versions to fix any boot failures, so make sure you’re updating your systems on a regular basis. Now that Debian and Ubuntu have released fixes for these boot regressions, I believe more GNU/Linux distribution based on them will adopt them too. For more details on the required mitigation steps, please check out this support article.
GRUB2 THEMES LINUX MINT INSTALL
We apologize for the inconvenience,” said Canonical in the security advisory.Īccording to Canonical, to fully mitigating these new GRUB2 vulnerabilities, users will have not only to install the updated GRUB2 packages, but also to apply a UEFI Revocation List (dbx) to system firmware, which will be provided to all Ubuntu users at a later time.
GRUB2 THEMES LINUX MINT UPDATE
“Unfortunately, the update introduced regressions for some BIOS systems (either pre-UEFI or UEFI configured in Legacy mode), preventing them from successfully booting. After installing the new GRUB2 versions, users with BIOS systems should verify if the bootloader is installed correctly and if it has a correct understanding of their boot device location. Users must update their GRUB2 packages to version 2.04-1ubuntu26.2 on Ubuntu 20.04 LTS, 2.02-2ubuntu8.17 on Ubuntu 18.04 LTS, 2.02~beta2-36ubuntu3.27 on Ubuntu 16.04 LTS, and 2.02~beta2-9ubuntu1.21 on Ubuntu 14.04 ESM.Ī normal system update running the sudo apt update & sudo apt full-upgrade command will do the trick.
Now Canonical released today new versions of the GRUB2 packages in all of their supported Ubuntu releases, including Ubuntu 20.04 LTS, Ubuntu 18.04 LTS, Ubuntu 16.04 LTS and Ubuntu 14.04 ESM, to address the boot failure issues.
The Debian Project was among the first to publish updated GRUB2 packages at the end of July, just one day after the BootHole patches were published, for its latest Debian GNU/Linux 10 “Buster” operating system series, urging users to update their systems to grub2 version 2.02+dfsg1-20+deb10u2 in order to address the boot regression. However, for some, these patches broke the Secure Boot implementation and left people with unbootable systems. The issues opened up systems using Secure Boot to attacks, allowing local attackers to bypass UEFI Secure Boot restrictions and execute arbitrary code.ĭue to a highly coordinated effort between the security researchers who discovered the vulnerability and Linux OS maintainers, most GNU/Linux distributions were able to provide patches for their users. Last week, I was reporting on the BootHole vulnerability (and some other seven flaws) found in the GRUB2 bootloader, which is used by almost all GNU/Linux distributions out there. The recent GRUB2 updates that patched some serious security vulnerabilities also caused boot failure issues for some users, so fixes for these regressions have started appearing for some distros, including Debian and Ubuntu.