Upgraded today the kernel from 5.13.13-hardened to 5.13.14-hardened and it seems that there is a problem with the dkms-remove.hook as per details below.
[2021-09-07T12:05:20-0300] [ALPM] running '71-dkms-remove.hook'...
[2021-09-07T12:05:20-0300] [ALPM-SCRIPTLET] ==> Unable to remove module nvidia/470.63.01 for kernel 5.13.13-hardened1-1-hardened: Not found in dkms status output.
$ dkms status
nvidia/470.63.01, 5.13.13-arch1-1, x86_64: installed
nvidia/470.63.01, 5.13.13-hardened1-1-hardened, x86_64: installed (WARNING! Missing some built modules!) (WARNING! Missing some built modules!) (WARNING! Missing some built modules!) (WARNING! Missing some built modules!) (WARNING! Missing some built modules!)
nvidia/470.63.01, 5.13.14-hardened1-1-hardened, x86_64: installed
Me too, I had this though for another module. I’ve ignored it so far. Everything works fine on my end as well.
[2021-09-07T07:10:26+0200] [ALPM] running '71-dkms-remove.hook'...
[2021-09-07T07:10:26+0200] [ALPM-SCRIPTLET] ==> Unable to remove module vboxhost/6.1.26_OSE for kernel 5.14.1-zen1-1-zen: Not found in dkms status output.
This means the module wasn’t successfully built for the previous kernel and so DKMS can’t remove it (because it’s not there).
Generally, if you didn’t spot a failed DKMS module build during an update process then you’d spot it on reboot because something wasn’t working (in the case of nvidia, the display).
If the nvidia module is working with your currently-booted 5.13.14 then you’re fine.