Public bug reported: I would like to propose the following patch for Ubuntu 18.04 LTS
https://github.com/karelzak/util-linux/commit/8175ed3d74adacc895657ded7546cb3c5deeabad [Impact] * This patch allows to use sfdisk to remove boot flag from all MBR partitions. At the moment you can only "move" boot flag to other partitions. * Derivatives of Ubuntu that use Calamares might be impacted by this. At the moment KDE Partition Manager and KPMcore (which is used by Calamares installer) are working on migrating to Polkit, so that they won't need to run GUI as root. One of the steps was moving from libparted backend to sfdisk backend for partitioning operations, so kpmcore will require 2.32 or 2.31.1 with this patch to have full functionality. [Test Case] Assuming that your want to deactivate boot flag on /dev/sdb which has MBR partition table: sudo sfdisk --activate /dev/sdb - Without this patch you should see an error message. With the patch it will print: The bootable flag on partition 1 is disabled now. The partition table has been altered. Calling ioctl() to re-read partition table. Syncing disks. [Regression Potential] . * Should be extremely low. The change only adds a couple of lines in one file which parses arguments of "sfdisk --activate". Nothing would change unless you run sfdisk --activate * This patch does not change any libraries in util-linux, no need to worry about API/ABI stability. * GPT users are not affected at all. [Other Info] * This patch is part of util-linux 2.32. ** Affects: util-linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1752876 Title: sfdisk: allow disabling boot flag on MBR partition table To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1752876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
