Since you have the installation media, just mount the root partition and try accessing the files in /var/log.
>From the installer (as root) and assuming that /mnt is currently empty... $ mount /dev/sdXY /mnt $ cd /mnt/var/log/ $ ls -l Where X is your drive letter and Y is your / partition. You don't need to mount /home. You can probably just 'cat dmesg' to see the last message printed by the kernel. if syslog is there then you can see what other services might have failed. -Ben On Monday, August 18th, 2025 at 4:20 PM, Mark Phillips <m...@phillipsmarketing.biz> wrote: > Ctrl+Alt+F3 to does not take me to a CLI. I get a black screen with a > flashing cursor, but no prompt or any keyboard interaction. > > Mark > > On Mon, Aug 18, 2025, 3:49 PM Michael Ewan michaelewa...@gmail.com wrote: > > > As this article suggests, > > > > https://askubuntu.com/questions/1239025/after-upgrade-to-ubuntu-20-04-oh-no-something-went-wrong > > Get into a console login, and run the updates/upgrades again. I do > > not have any specific help since I have not seen that message myself. > > > > On Mon, Aug 18, 2025 at 3:35 PM Mark Phillips > > m...@phillipsmarketing.biz wrote: > > > > > I am running Ubuntu 20.04 on my Oryx Pro laptop. I performed a normal > > > update/upgrade and after a reboot, a white screen appeared with a sad > > > monitor graphic and "Oh no, something went wrong!" message. > > > > > > I have 2 drives, one for the OS and one for /home/mark in the machine > > > (sym > > > link to OS drive). I created a writable Ubuntu 24.04 Live USB stick and I > > > can boot the machine and access both drives. What diagnostics should I > > > run > > > to diagnose the problem? Especially to determine if I need a new OS > > > drive. > > > > > > Or, should I just install Ubuntu 24.04 on the OS drive? The downside is > > > the > > > time needed installing all my apps and removing/reinstalling the > > > /home/mark > > > drive (so I don't mess that up!). > > > > > > System76 tech support was next to worthless. Waited 6 days for "We are > > > very > > > busy so just reinstall the OS". > > > > > > Thanks!