SOLUTION BELOW
I have never been in a more confusing situation regarding Linux.
I have a Dell XPS 15 9560, which had a dual boot Windows 10 / EndeavourOS setup. It was running fine for months. 10 days ago I updated Linux and after restart it couldn't boot anymore. It got stuck at "A start job is running for /dev/disk/by-uuid/..." (which is the root partition).
First, with the help of a friend of mine who is quite knowledgeable about Linux (he runs vanilla Arch, etc), we spent 5 hours trying to fix it but had no luck.
Then I decided to back up everything and do a fresh install. Aaaand the same error happened again on the first boot. Then I though "ok, probably some problem with Arch, lets try Fedora". Nope. Some similar error about not finding the root partition. (Here I must say that the kernel which was shipped with the ISO was working fine, but after updating to the latest one, it failed.) Here I thought "ok, then it might be a problem with the latest kernel, let's install EndeavourOS with the LTS kernel." Nope, LTS kernel also didn't boot. Then I tried Ubuntu and it worked, but that's not solving the problem. Then I decided to put another nvme drive in the laptop and try there. The same error again.
Now the greatest part: If I put the nvme drive into an external usb case, EndeavourOS installs, updates, boots without any problem, no sign of the error.
So now I don't know how to proceed... Maybe there is something wrong with the pcie port in my laptop, but except for the booting problem, windows is working, I can also mount and access every partition in the ssd through a live usb. So no other signs of problem with the port whatsoever.
I would be grateful for any advice as I've lost several days trying to solve this and I am out of ideas...
Solution: The last working kernels are from 11. August 2023 (both linux and linux-lts) linux-6.4.10.arch1-1 and linux-lts-6.1.45-1. You can download them from here: linux / linux-lts and install them with
sudo pacman -U the_path_to_the_package
Thank you all for the help!
This is the log https://ufile.io/p5wj1hu0
I'm not sure if this is relevant, but I added
pci=nommconfto the kernel parameters as I had errors similar to the one in this topic, otherwise the log was over 40 000 lines long.Edit: I'm not sure if this is exactly a kernel problem, as I get the same error when booting with the LTS kernel, which is older than the one installed with the offline installer.
No worries. When checking that output, it is for the working 6.4.8-arch1-1 kernel. The broken kernel boot attempt would be most useful, but I don't want to make you suffer to get it, if you are back to a working system. I think at this point it is safe to say your laptop isn't a fan of the newer kernels.
I would :
/etc/pacman.confto ignore updates to packageslinuxandlinux-lts--
Ideally: You could (from a working system) install a known working LTS image (pkg
linux-lts), and exclude that from updates until you land on a working kernel release (keep an eye ontestingandcorerepos once a week or so). in this way, you'll have a working LTS, and can upgrade/downgrade mainline kernels as you please, booting back into LTS to correct issues should they arise.edit: minor
I found the problem! It was actually the kernel, just both the latest and the lts versions released after 11th of August don't work. So for now I need to stick to the versions from 11th. Thank you very much for the help!
Edit: this is the bug