[Solved] SDDM not starting on NVIDIA GPU on kernel 6

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Star4Fun · Post by **Star4Fun** » Thu Mar 23, 2023 10:41 am

I have a NVIDIA 1080 ti with the latest driver on my gentoo installation. I compiled the newest kernel, but since version 6.* my display-manager won't start anymore. I tried my previous 5 kernel and it works well. (Using gentoo-sources) I already tried to reinstall SDDM with empty-tree keyword as well as trying to use lightdm, but unfortunately nothing works. Please let me know if you need any logs. Thanks in advance.

m.s.w · Post by **m.s.w** » Thu Mar 23, 2023 7:16 pm

I am guessing that you didn't emerge again nvidia-drivers when booted in new kernel.
Try it.
Cheers.

Post by **NeddySeagoon** » Thu Mar 23, 2023 8:20 pm

Star4Fun,

To expand and generalise on what m.s.w said

Make sure your /usr/src/linux symlink points to your new kernel

Code: Select all

emerge @module-rebuild

will then build all of your out of tree kernel modules for the new kernel.

The nvidia-drivers kernel modules are one example. There are others too, which you may not use.

Star4Fun · Post by **Star4Fun** » Sat Mar 25, 2023 11:07 pm

Thanks a lot for your help. I did rebuild the modules but I noticed that genkernel failed for the initramfs because it got remove. I don't know if this was the problem but it could be. Another thing I noticed was the warning the Nvidia driver printed after it finished emerging. So I changed a couple of kernel options. If I remember correctly, then I added the nouveau driver as a module so that CONFIG_DRM_KMS_HELPER got enabled and disabled the default framebuffer driver. I am not certainly sure what fixed the problem, but it works now.