One machine in which I have an old nVideo geforce 210 video card, upon upgrading from 6.13.6, does not have video, other machines with different nVidia cards and nouveau are working but thie Geforce 210 does not work, It does work on a 6.13.6 kernel.
Please report here: https://gitlab.freedesktop.org/drm/nouveau/-/issues/ Bisecting is advised: https://docs.kernel.org/admin-guide/bug-bisect.html