This bug was fixed in the package grub2 - 2.04-1ubuntu29 --------------- grub2 (2.04-1ubuntu29) groovy; urgency=medium
* grub-install: cherry-pick patch from grub-devel to make grub-install fault tolerant. Create backup of files in /boot/grub, and restore them on failure to complete grub-install. LP: #1891680 * postinst.in: do not exit successfully when failing to show critical grub-pc/install_devices_failed and grub-pc/install_devices_empty prompts in non-interactive mode. This enables surfacing upgrade errors to the users and/or automation. LP: #1891680 * postinst.in: Fixup postinst.in, to attempt grub-install upon explicit dpkg-reconfigure grub-pc. LP: #1892526 -- Dimitri John Ledkov <x...@ubuntu.com> Tue, 01 Sep 2020 20:04:44 +0100 ** Changed in: grub2 (Ubuntu Groovy) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1892526 Title: dpkg-reconfigure grub-pc no longer prompts for grub-pc/install_devices Status in grub2 package in Ubuntu: Fix Released Status in grub2 source package in Trusty: New Status in grub2 source package in Xenial: New Status in grub2 source package in Bionic: New Status in grub2 source package in Focal: New Status in grub2 source package in Groovy: Fix Released Bug description: [Impact] * dpkg-reconfigure grub-pc no longer reinstalls grub, as it should. [Test Case] * Set grub-pc/install_devices to some invalid device that does not exist (i.e. /dev/hda) * Execute $ sudo dpkg-reconfigure grub-pc One should expect attempts to grub-instal onto /dev/hda, fail that, and see dialogues asking which devices to install grub-pc onto, and successfully install them. [Regression Potential] * We are patching, the recently/newly added postinst condition to skip trying to install grub-install during typical/regular upgrades. Further tighten the conditions there, to still force install grub- install when executing grub-reconfigure to be inline with existing documentation that this is the command to use when one wishes to reinstall grub-pc interactively. [Other Info] * Original bug report I recently had a RAID-5 disk failure and was greeted by an inoperable grub due to not having installed grub on all the disks. I temporarily fixed this problem by manually running "grub-install" on the other disks in the array and got my system working. Previously it was advised to run "dpkg-reconfigure grub-pc" and select the relevant disks to ensure that future grub updates installed on all the disks in the array. This command no longer prompts for the install disks due to the changed introduced by https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1889556. In /var/lib/dpkg/info/grub-pc.postinst, the following elif block immediately precedes the elif block that prompts for grub- pc/install_devices and short circuits on all recent grub versions: elif dpkg --compare-versions "$2" ge 2.04-1ubuntu26; then # Avoid the possibility of breaking grub on SRU update # due to ABI change : I can confirm this issue is present on 20.04.1 and it appears to be present on 18.04.4 per https://askubuntu.com/questions/1212569/dpkg- reconfigure-grub-pc-no-option-to-select-boot-device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1892526/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : group.of.nepali.translators@lists.launchpad.net Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp