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I got that error on arch linux after booting: cannot mount /boot/EFI unknown file system vfat. I downgraded the kernel and now everything works, but what should I do now? How do I fix this?

EDIT: following this thread I tried to upgrade my system and run mkinitcpio and I got this error: ==> ERROR: '/lib/modules/6.0.12-arch1-1' is not a valid kernel module directory. I upgraded to linux-6.1.1.arch1-1...

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    Did you built your kernel yourself? With the kernel where this does not work, run grep vfat /proc/filesystems and modprobe vfat and add the dmesg output that appears after running the last modprobe command. Commented Dec 26, 2022 at 10:49
  • Your new kernel installation seems to be broken: you're missing its modules tree. Commented Dec 26, 2022 at 11:27
  • Just like if make install was run, but make modules_install was not. Commented Dec 26, 2022 at 11:28

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Reboot. Run uname -a. Are you running 6.0.12 or 6.1.1? If 6.1.1, run pacman -S linux (reinstall it). Should run mkinitcpio as part of the re-install.

ALWAYS reboot after you upgrade. ALWAYS.

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