To compile a package I went on installing
systemd package from Utopic 14.10 with all its dependencies on my [Modified] Ubuntu 12.04. As it's not existing in Systems prior to Trusty 14.04.
Everything went fine until I rebooted my computer the next day. Then I discovered that I am stuck at the login screen. i.e. my password is accepted but something fails later (before any desktop is shown) and I am returned to the login screen.
From an Ubuntu USB stick I performed a
$ sudo chroot /mnt after mounting my root partition [+ /boot /home and /boot/efi partition] on
I discovered after launching gconf-editor that all schemas are un-readable by Ubuntu 12.04 as they surely have been upgrated to the GNOME Utopic 14.10 version.
$ xhost + $ for i in /dev /dev/pts /proc /run /sys; do sudo mount -B $i /mnt$i; done $ sudo cp /etc/resolv.conf /mnt/etc/ $ modprobe efivars $ sudo chroot /mnt # export DISPLAY=:0.0 # gconf-editor
All schemas for apps / desktop / system are unreadable and a key icon is displayed.
When double clicking any schema I get a pop-up window saying
Currently pairs and schemas can't be edited. This will be changed in a later version.
So my question is : As these schemas were modified by triggering scripts when installing the
systemd package, is there anyway I can re-generate valid Precise 12.04 schemas ? Or should I throw away my entire Precise 12.04 system because of these GNOME quirks ?
I did re-install the packages
gnome-settings-daemon however to no avail.