The file .xsession-errors ends with the error from the x-window-manager ... 
'SESSION_MANAGER environment variable not defined'

If it was defined before, why not now?  Could it be related?  What should it be 
defined as?

Nov 1, 2026 11:25:29 PM Donald MacDougall <[email protected]>:

> I have an Acer Aspire laptop.  I hadn't upgraded it in a long time.  It was 
> still on bullseye which recently stopped receiving security updates, so I 
> decided it was time to do it.  I upgraded to bookworm which went swimmingly.  
> Then I upgraded to Trixie which went even better.  I have been using xfce for 
> many many years and it seemed to work splendidly till I went to shut it down 
> and found that the "Reboot" option which had always been the last option on 
> the Apps list was no longer there, so I opened a command line window and used 
> the command "systemctl power off"and this worked fine.  I had also noticed 
> the "halt" option in the systemctl man page and remembered decades ago using 
> the halt command to power down computers and wondered what the difference is 
> between that and poweroff, so I tried it.  After that when I started it up 
> again, logged in and typed 'startx',  instead of seeing the normal desktop, 
> all I see is a black screen with a mouse cursor in the middle which I can 
> move around at will but it does nothing.  Apparently halt has changed meaning 
> since way back when.
> 
> I'm on Wayland obviously with lightdm
> 
> I had a similar thing happen several years ago on a desktop computer and I 
> never figured it out, but I created a new user which worked fine so I never 
> bothered to spend the time to trouble shoot, but this time that isn't 
> working.  The new user gets the same black screen.
> 
> I'd really appreciate suggestions.
> 
> I don't have my email set up to be used from the command line so I'm sending 
> this from my phone, which makes it difficult to cut and paste, but if more 
> information is needed I'll do my best to supply it.

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