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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I'm on debian 11, this error doesn't show up every time, but once it appear I need more that one reboot and it will fix automatically without doing nothing, don't know the reason why (just read that can be kernel dependent). What I want to avoid is that maybe it's just a warning of somethink that will cause a pc break in future (maybe hardware is starting working bad?) Do you have any sugggestion? Thanks
In the grub menu, choose advanced options and then choose an older kernel to boot into.
If that boots fine, remove and reinstall the newest installed kernel and run
sudo update-grub.That should be the easiest way to fix the most possible causes of this error.
Edit: Now would be a very good time to back up all your data to an external drive. This might be a sign of your hard drive failing.
I second the advice to switch to a different/previous/known good kernel. That has been the cause a most boot problems for me. I just had it happen on a VM a couple of weeks ago, so I switched to the old kernel, then removed the new kernel. I’ll wait for another kernel before upgrading.
It’s probably worth scanning your disk just in case as well.