How to Troubleshoot "Failed to Load Session" Errors?
On the Upgrade from 11.10 to 12.04, My Xmonad + Unity Configuration No Longer Works. When I Attempt to Log into This Session, I Get "Failed to Load Session...
On the upgrade from 11.10 to 12.04, my XMonad + Unity configuration no longer works. When I attempt to log into this session, I get "failed to load session 'xmonad'". Where can I look to figure out what's going wrong?
5 Answers
What worked for me was to remove the references to unity-2d-launcher entirely from my /usr/share/gnome-session/sessions/xmonad.session (which I had configured for 11.10 the way Mark Hansen suggested):
[GNOME Session]
Name=Xmonad Unity
RequiredComponents=gnome-settings-daemon;
RequiredProviders=windowmanager;panel;
DefaultProvider-windowmanager=xmonad
DefaultProvider-panel=unity-2d-panel
I always use the shellPrompt instead of the unity launcher anyway, so I don't miss the launcher at all.
I was able to get the XMonad + Unity configuration to work. I examined the relevant configuration files in /usr/share/xsessions/ and /usr/share/gnome-session/sessions/ (for more info see ), and tried to run the various executables they reference. I thus discovered "gnome-panel" had been uninstalled on the upgrade, so I reinstalled it.
The best place to look would be in ~/.xsession-errors you could also try /var/log/syslog.
The problem is that Unity-2d-launcher no longer exists in Precise.
You can change it to unity-2d-shell in gnome-session/sessions/xmonad.session
and in ~/.xmonad/xmonad.hs
However, even after doing this, I'm seeing a lot of weird behaviour.
Possibly relevant: I recently upgraded and found I needed to delete the file ~/.xmonad/xmonad-x86_64-linux, and all was fine. I run gnome + xmonad, but this step is relevant to any upgrade. See here for more notes on my experience.
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
