Boot problem after (Kernel) upgrade, more info

[Grizzly]

20 September 2021  at 8:36, Keith wrote:
Re: Boot problem after (Kernel) upg (at least in part)

>On 9/20/21 5:28 AM, Grizzly via ubuntu-users wrote:

>I would have thought adding the third party PPA containing the modified
>340 driver would have been just an update to the currently installed
>package. Add the PPA and then run "apt full-upgrade" and that would be
>it. You'd only want to remove the Nvidia driver if you were going with
>the 4th option to exclusively use the nouveau driver.

Maybe my mistake, but in most docs about installing nvidia drivers thye say 
remove -- purge old drivers first

>When you say 5.8 is unusable, are referring to the low res display you
>got previously when you tried the nouveau driver? 

A mix of 640x480 windows on a 1920x1200 screen (bottom of each window not 
reachable) and if I tried to shrink a window the system froze up, as did  any 
terminal at random points

>But before doing that, BACKUP YOUR DATA and then create a bootable cd or
>usb drive with a 20.04.2 (not .3, it has the 5.11 kernel) image so that
>you have rescue disk on hand if things go wrong.

I did after another day wasted, conceed and go for a fresh install option, 
(with intent to try thord party ppa) on the grounds that anything I may learn 
sticking with it was out weighed but the lost time

I did not have any backups of the 20.04 system, as /Home had not changed really 
since the upgrade 18.04.5 > 20.04, but I did have one from 18.04, 

I did the fresh install (with update during install) and had a working (albeit 
only 1024x768) system, added the ppa, ran the fix, all looked good, was going 
to backup before doing anything else, got as far as starting backup app, but 
changed mind and went for a reboot first

On reboot screen was now 1920x1200, did a few minor changes, icon size, set 
night-light, added terminal to dock, and then thought a backup would be a good 
way point (just in case) BUT Backup had gone, no sign of it anywhere, have I 
found another strange bug? I cant even find it in Ubuntu Software to install 
(assumes app is called Backup ??)

>I don't know why your NIC is not showing up in the 5.11 kernel. I looked
>at the packages that get installed with the 340 driver and nothing
>stands out that would affect a RealTek NIC when you remove them.

that had me confused, as 5.8.0-59 did have NI

lshw & lspci  both show the card as "unclaimed" on 5.11.0-27 

>According to the nouveau driver website,
>https://nouveau.freedesktop.org/FeatureMatrix.html, your GeForce 8300
>(grouped under the NV50 class) is fairly well supported - certainly for
>regular desktop use

It is a "normally" stable work horse on most OS's and as I'm no gamer fine for 
my use, it plays 720p & 1080p movies without a twitch (on VLC)

Many thanks, I've learned a lot