Compiler mismatch, can't upgrade Ubuntu

Alejandro

12/7/23, 1:11 PM

Let me give you a brief introduction:

I use a really old and tiny netbook (11 years) to play around with new tools, try out different OS and so on, kind of a little (and portable) lab. Hardware specs are low, as expected (Old Intel Atom, 2 GB RAM and a 500GB HDD). Recently, I updated it with lubuntu which uses LXQt, works decent.

Now with the problem:

While sudo apt update'ing in the couple days before I noticed an error related with nvidia-tesla-450-kernel-dkms, no big deal since it would end up working, but at this moment when trying to sudo apt upgrade to keep up to date 6 packages I get an error stating that there has been an error processing nvidia-tesla-450-kernel-dkms. A bit higher says

Error! Bad return status for module build on kernel: 5.15.0-56-generic (x86_64). Consult /var/lib/dkms/nvidia-tesla-450/450.203.03/build/make.log for more information.

When inspecting the log file I encountered this:

Compiler version check failed: [...]

gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0, GNU ld (GNU Binutils for Ubuntu) 2.38

does not match the compiler used here:

gcc (Debian 12.2.0-9) 12.2.0

[...]

It is recommended to set the CC environment variable to the compiler that was used to compile the kernel.

What should I do? I've been reading this but I'm not completely sure what to do. Do I have to use an older version of the compiler rather than the updated one to solve the problem? If so, how? I'm not that experienced solving technical problems in Ubuntu.

0 + 4

upgrade

apt

nvidia

kernel

drivers

steeldriver

12/7/23, 1:51 PM

So you have installed gcc-12 and made it the default on your system? or am I reading it the wrong way around?

Alejandro

12/7/23, 1:59 PM

@steeldriver No, it is a quite a fresh install of lubuntu, no big changes so far. The only part that may have gone wrong was adding Kali Linux's repos and installing a few headless tools, which after a few problems (and a long wait) I gave up. Maybe that has caused the problem? A lot of libs and other packages installation were cancelled. If there is no easy solution for this I might just reinstall the OS, no personal data will be lost and I'll remove the question. I'm just wondering what the solution is so I can get some experience solving these types of problems.

steeldriver

12/7/23, 2:08 PM

OK so adding the output of `apt policy gcc` to your question might be helpful in sorting this out

Alejandro

12/8/23, 9:17 AM

@steeldriver The output of `apt policy gcc` lead to the solution. The problem was gcc-12 being installed along other kali tools, which caused the compiler mismatch problem. I had gcc-11 (which was the one originally used) and gcc-12 on top of it, being originated in kali-repos. Removing gcc version 12 should solve it (although I couldn't due to another error), ended up reinstalling the OS.

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