I use GDM and usually run an XFCE4 session. Suddenly, if I attempt to boot in using GDM, the following symptoms appear:
- The GDM background does not go away.
- Windows from two applications (remains of an old session?) are visible.
- No windows can be interacted with (xfwm does not appear to be working).
The xfce panel is present and Whisker Menu can be launched but not interacted with.
However, if I go to tty1 and launch lightdm and log in to the same account, a new and fully operation XFCE session starts (complete with working xfwm4).
While the obvious workaround is to simply use lightdm, I would like to actually fix this new problem that seems to have suddenly begun. I did a complete shutdown last time the system worked normally.
What could cause this and how should I attempt to troubleshoot it? I am a recent Windows refugee and this is beyond my current realm of knowledge.