Computer bricked - KERNEL PANIC on boot

[SpicySocks]

Hi there,

I've been using Kubuntu about a month without too many issues (except with my nvidia graphics) and I justwoke up today to my computer having KERNEL PANIC when I boot it.

I can still get to the grub menu, but it can't open kubuntu in its normal state or in recovery modes without eventually seeing the Kernel Panic screen.

in recovery mode, there will be lots of commands running down the screen I can't interact with, it also cotinuously talks about USB devices even when none are plugged in.

I tried using the grub menu to boot into the original install flash drive I used for kubuntu, which brought me to the menu in that flash drive, but when I chose "try kubuntu" it just gave me a black screen that I could type in, but typing "help" and pressing enter just moved the cursor to a new line.

As for what could have caused this, my nvidia graphics card suddenly stopped running when I turned on Linux, so I went to the "Additional Drivers" section in kubuntu and installed new nvidia drivers that weren't open or server versions. Some errors popped up that I didn't write down, but it said it was installed afterward and didn't give me other buttons to press, so I kept using the computer as normal. I think that is the only thing that could have affected the kernel? I previously had manually installed nvidia drivers before using the "Additional Drivers" page yesterday.

Could I please get some urgent help and guidance so I can use my computer again, preferably without losing all of my files?

system info:
Im using a dell g15 laptop with an AMD processor and a geforce 3050 graphics card: https://www.dell.com/en-us/shop/dell...15-5535-laptop

I'm not sure which kubuntu version I'm running, but the advances boot options from the grub menu include Linux 6.14.0-27-generic, and grub is version 2.12

[SpicySocks]

Pictures of the screen

[TinyTim]

Hi, I'm not a Top member, and have never experienced this problem. What I have found is that error 71 is a hardware conflict with the kernel. This is what I think it is doing.... https://www.spinics.net/lists/usb/msg02644.html (Their solution modify the following line to /etc/modprobe.d/options:
options usbcore use_both_schemes=y)
You would do well to wait for one of the Top members to comment to make sure this is correct.

[TinyTim]

SpicySocks, I stumbled into a Linux user who says they simply unplugged the machine to power down, and it forgot about the USB conflict and began to work normal again. You could unplug the USB device, power down, boot up, plug it back in. Make it forget about that device and reset.

[SpicySocks]

Thanks for your help, ill wait for a top user like you suggested but it makes me feel better knowing people will look at this and help

[TinyTim]

I am very interested in what they have to say about this as well.

[SpicySocks]

Hi everyone, I found a way to get into my computer again. The short answer is that I used SystemRescueCD running off a live usb to get into my files, and then manually deleted driver files. After that, I removed any Nouveau driver blacklists and booted into Kubuntu. I also ran memtest to see if my RAM was okay, but it passed so nothing to worry about there.

For anyone else who gets screwed by nvidia (again), here's what I did:

1. Download SystemRescueCD and burn it to a flash drive, you can find their guide to get started here. I used my partner's windows computer, but you might not have to.
2. Load into my computer's GRUB menu, press c, and follow these instructions to boot into the flash drive: https://askubuntu.com/questions/9474...ough-grub-menu You can tell which drive is which based on the nametag (should include "RESCUE" if you use the same OS I did), and/or the amount of space.
3. I figured out which drive was my linux file system, I think I used fstat to do that, and then I mounted it to /mnt using ntfs-3g
4. chroot into the mounted drive
5. Uninstall all apt packages related to nvidia using the command

   sudo apt-get remove --purge '^nvidia-.*'​

   , which I found in this ask ubuntu post
6. Follow the instructions from this nvidia forums post to delete leftover nvidia libraries: https://forums.developer.nvidia.com/...-hand/238053/2
7. Go to /etc/modprobe.d/ and remove any blacklist files for nouveau drivers
8. use umount /mnt to unmount the linux drive

That let me boot into my computer fine, but obviously I'm not using the nvidia drivers anymore. I think I'm going to do a clean install after this since I clearly borked this one pretty bad. I might try Mint next since I hear it handles hybrid GPUs pretty easily and I haven't tried Cinnamon. I'll probably come back to KDE some time though because I love it so much...