nixos/nvidia: fix /dev/nvidia* devices minors

We can't assume that DRI card minor is the same as NVidia GPU device minor,
because some DRI minors could be taken by GPUs of other vendors.

Fixes #87788, #98942.

nixos/modules/hardware/video/nvidia.nix

@@ -363,7 +363,8 @@ in
         # Create /dev/nvidia-uvm when the nvidia-uvm module is loaded.
         KERNEL=="nvidia", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidiactl c $$(grep nvidia-frontend /proc/devices | cut -d \  -f 1) 255'"
         KERNEL=="nvidia_modeset", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-modeset c $$(grep nvidia-frontend /proc/devices | cut -d \  -f 1) 254'"
-        KERNEL=="card*", SUBSYSTEM=="drm", DRIVERS=="nvidia", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia%n c $$(grep nvidia-frontend /proc/devices | cut -d \  -f 1) %n'"
+        KERNEL=="card*", SUBSYSTEM=="drm", DRIVERS=="nvidia", PROGRAM="${pkgs.gnugrep}/bin/grep 'Device Minor:' /proc/driver/nvidia/gpus/%b/information", \
+          RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia%c{3} c $$(grep nvidia-frontend /proc/devices | cut -d \  -f 1) %c{3}"
         KERNEL=="nvidia_uvm", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-uvm c $$(grep nvidia-uvm /proc/devices | cut -d \  -f 1) 0'"
         KERNEL=="nvidia_uvm", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-uvm-tools c $$(grep nvidia-uvm /proc/devices | cut -d \  -f 1) 0'"
       '' + optionalString cfg.powerManagement.finegrained ''