I put desc and a placeholder for this critical bug and solution making is here and https://gitlab.xfce.org/xfce/xfce4-panel/-/issues/502 for anyone experiencing a rough XFCE 4.14 -> 4.16 upgrade
Sys: Ubuntu Studio 20.04.2 LTS 64 bit
The problem:
https://gitlab.xfce.org/xfce/xfce4-panel/-/issues/502
XFCE 4.16 problem manifested in the weird way: I first added multiple indicator as described in gitlab report, then the whole session ejected to login GUI.
From that point, for that user, it successfully logs into the default user, only to log out and shut down X session after approx 8 seconds of restoring XFCE session.
Speculative thinking on causes:
could be mix of;
broken dependencies
corrupted session file
Further practical steps - guidance on how to determine possible culprits appreciated:
XFCE session data corruption;
-location of XFCE session data
-location of XFCE logs to check what is going on during session restore
X windows system - Input system behaving weird;
a.) firefox input fails like its frozen, and focus to e.g. terminal app, typing few letters, then focus back to firefox resume input
b.) lock screen when XFCE "ask for password" option is ticked (by default) is broken -> X windows input and screen is not functional
That , at least to me, indicates possible component mismatch, package or config problem
Broken dependencies;
-finding and fixing it
Let's see