config/guix/system/laptop-mimimi: Properly blacklist nouveau.

.config/guix/system/laptop-mimimi.scm

@@ -90,6 +90,7 @@ EndSection")
                          (xorg-configuration
                           (modules (list xf86-video-vesa
                                          xf86-video-intel
+                                         ;; xf86-video-nouveau ; Make sure this is on if the 'nouveau' kernel module is loaded.
                                          xf86-input-libinput))
                           (extra-config (list %mimimi/xorg-touchpad)))))))))
 
@@ -153,6 +154,14 @@ EndSection")
   (host-name "mimimi")
 
   (kernel linux)
+  ;; (kernel linux-xiaomi-air-13)
+  ;; To disable the Nvidia, first make sure nouveau is not loaded then call
+  ;;   sudo tee /proc/acpi/bbswitch <<<OFF
+  ;; Check the result with
+  ;;   sudo dmesg | grep bbswitch
+  ;; It saves about 1h of battery.
+  ;; TODO: Automate the bbswitch command when the Guix package is merged.
+  (kernel-arguments '("modprobe.blacklist=nouveau"))
 
   (mapped-devices drive-mapping)