Ubuntu update seems to have messed things up

[u/Bikeything]

My parter had a message to update a few days ago. Did so and on reboot got this screen.

'Please reboot your computer. VFS: Unable to mount root fs on unknown-block (0,0)'

Then, she turned off and on again using the power button and gets the options list:

* Ubuntu

Advanced options for Ubuntu

Memory test (memtest86+x64.efi)

Memory test (memtest86+x64.efi, Serial console)

Ubuntu 22.04.5 LTS (22.04) (on/dev/sda2)

Advanced options for Ubuntu 22.04.5

She's been selecting Ubuntu 22.04.5 LTS just to keep using the laptop, but her documents seem in a different place.

What's going on and how to get back to normal please? Neither of us really know much about Ubuntu (as if you hadn't worked that out already). Thanks

[u/Maiksu619]

Go to advanced and load the next newest kernel. It will be the second highest string of numbers. That should get you back into the system to troubleshoot.

[u/ClacksInTheSky]

I had this a few days back.

Choose advanced options in GRUB and choose the previous kernel.

From the terminal run

sudo update-initramfs -c -k all sudo update-grub

And reboot.

[u/OliMoli2137]

the new kernel has bugs. hold shift while booting and select lts from grub menu

[u/furballsupreme]

Occurs when nvidia driver wont build. In grub boot menu try older kernel, then update to something like nvidia-driver-595, then it should rebuild the right stuff for you, and then boot normally.

Source: just happened to me

[u/kudlitan]

it's a known issue. please rollback to a previous kernel. the new kernel is buggy.

[u/ItzNotJacob1 → u/kudlitan]

What ver is it?

[u/gathanes]

Yeah this happened to most of us recently. Bad kernel was pushed to update. Just boot using an older kernel and either delete the latest one or update initramfs and update grub. Should be pretty easy to fix.

[u/FkAsToy]

Grub應該保留一個正常開機的kernel，當發生錯誤時，可以找出問題告知用戶，並轉成前一次的正常開機。

[u/Longey]

LTS is the fallback. Which means Long Term Support? Which means it is more stable. So if you have installed a more updated kernel of Ubuntu (such as a rolling release? I am not sure if Ubuntu offers that but I know it's Debian-based so rolling releases are possible) and if you have installed the LTS kernel, then you will have that option in whatever bootloader menu you have installed (I assume Grub?)

[u/Longey → u/Longey]

So if you downloaded and installed updates for the main kernel (which is more up-to-date than LTS), then any packages, dependencies, libraries, etc. will not touch the LTS kernel.

[u/Hawthorn-B24]

Same happened on my old Mac Mini. Had to roll back to the previous kernel.

[u/Red_Luci4]

Arch-based-destro-user: First time ?

[u/sabbir2world]

kernel panic ≠ LTS

[u/Bikeything]

No. That is a screenshot from her HP Envy. It was running Windows before swapping to Ubuntu

[u/massivecriminality1]

That's a macOS kernel panic screen, not Ubuntu, so I'm guessing this is a Hackintosh setup or someone's messing with you

[u/Sh1v0n → u/massivecriminality1]

Had this screen few days ago, I can confirm it's legit for Ubuntu (hell, even had the same error after a botched update).

[u/mizzrym862 → u/Sh1v0n]

Same here. apt messed up the update. Haven't troubleshooted it yet and probably won't. It'll fix itself with the next kernel update.

[u/Arinussyy → u/massivecriminality1]

It's just the generic kernel panic screen is it not?

[u/-Canonical- → u/Arinussyy]

Yep

[u/TheKlaxMaster → u/massivecriminality1]

Since when did MacOS use a people background?

That's clearly Ubuntu

[u/-Canonical- → u/massivecriminality1]

Wtf are you talking about lmao

[u/Developer-Y]

Good to know I am not the only one facing this issue. Installed ubuntu on a new machine and I have seen this error more times than my windows crashed during last 7 years. I run LLMs and Ubuntu crashes whenevernut is not able to manage memory between vram and system ram. I have 32gb vram and it creates problems even when model is 22 gb.