gnome-session-flashback.target is a disabled or a static unit

On Ubuntu 18.04 (64-bit)

Hello, I uninstalled my amdgpu driver along with my video card and it bricked my GNOME session - I get an endless login loop. My unity session works fine. If I try to reinstall the classic session, I get:

sudo apt install --reinstall gnome-session-flashback
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required: linux-headers-4.15.0-91 linux-headers-4.15.0-91-generic linux-image-4.15.0-91-generic linux-modules-4.15.0-91-generic linux-modules-extra-4.15.0-91-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 8 not upgraded.
Need to get 5140 B of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 bionic-updates/universe amd64 gnome-session-flashback all 1:3.28.0-1ubuntu1.4 [5140 B]
Fetched 5140 B in 0s (107 kB/s)
(Reading database ... 303131 files and directories currently installed.)
Preparing to unpack .../gnome-session-flashback_1%3a3.28.0-1ubuntu1.4_all.deb ...
Unpacking gnome-session-flashback (1:3.28.0-1ubuntu1.4) over (1:3.28.0-1ubuntu1.4) ...
Setting up gnome-session-flashback (1:3.28.0-1ubuntu1.4) ...
gnome-session-flashback.target is a disabled or a static unit not running, not starting it.

I've installed the card again, with the exact same amdgpu-pro driver, but this error continues to persist.

Any help is appreciated!

Regards, L. B.

1 Answer

I managed to fix it by:

sudo apt-get purge gnome-session-fallback
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get install --reinstall gnome-session-flashback
sudo apt-get install --reinstall ubuntu-desktop

Note: the penultimate command will fail again, but ignore this. I suspect that only the last command is really needed, but this is what I did as a sequence exactly.

I followed this post:How to fully remove all packages installed by 'gnome-session-fallback'?

Regards, L. B.