22.04 login problem

[Grizzly]

03 May 2022  at 11:56, Liam Proven wrote:
Re: 22.04 login problem (at least in part)

Many thanks 

It is now working but I don't like to leave replies unanswered

>On Fri, 29 Apr 2022 at 19:19, Grizzly via ubuntu-users
><ubuntu-users at lists.ubuntu.com> wrote:

>> I upgraded Unity 21.10 to 22.04 (also Unity luckily) rebooted many times, left
>> it and came back today, now I can't login now, dialogue reports "session failed
>> to start" or similar wording

>Many questions arise from this, but:

>> as I'm not on that box (duh)

>Hang on, what? Please explain what that means? It is _highly_ relevant to
>troubleshooting. 

Problem two fold, 
first I had spent ages trying to work out why/how the pastword had changed? I 
reset it (AFAIK) from the recovery consol, duel boot 18.04 and a 21.10 live 
USB, so had given up for a while, until wiser heads gave me a direction (before 
doing something I could not recover)
 
Second (and more anoying) the monitor (Samsung SM245B) that is on that box has 
developed a problem with the cold, it wont start, so I was on another PC that 
has an SVGA out so can run on an older smaller Dell monitor

>What GPU? What driver before? What driver now? What desktop manager? 

If you can give a cmd that will give me these I can use next time, It's an 
nVidia card using the 340 driver before and after (AFAICT) with patch

xorg-modulepath-fix

that was disabled/removed by update but reapplied after to get a GUI back

>What session is selected? What sessions have you tried? How? What happened
>when you did? 

I don't think that I get a choice, no sign of the "cog wheel" in the logon box

I'm glad it is working again (at least when the mercury is higher :->) I've 
learned a lot while trying, but have more unanswered questions now i.e.

Why / How 
filefix finds "no suitable file system"
there is no sign of gnome-session-manager (sudo apt-cache policy 
gnome-session-m*) not installed nor a candidate

that one (and advice to install all gnome "stuff") sent me down a deadend 
trying to find it, untill I checked working 18.04 & 20.04 lappies and not there 
either