[Bug 2017432] [NEW] subiquity installer doesn't create /etc/default/grub

[Launchpad Bug Tracker]

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The new subiquity installer in Ubuntu 23.04 fails to create a
/etc/default/grub file when installing using the 'Erase and install
Ubuntu' or 'Something else' options under Installation Type. In either
case, when installing on a second NVMe drive in the presence of a first
NVMe drive containing an existing Window 11 installation, the installer
claims the installation has been completed and that the installation
media should be removed. However after restart, the Windows Boot Manager
isn't shown in the grub menu. Checking for /etc/default/grub, I
discovered it was missing from the newly installed Ubuntu 23.04. To
solve this issue, I had to resort to...

cd /etc/default
sudo cp /usr/share/grub/default/grub grub

and then execute 'sudo update-grub'.

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

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subiquity installer doesn't create /etc/default/grub
https://bugs.launchpad.net/bugs/2017432
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