diff --git a/ubuntu.md b/ubuntu.md
index 3a64a67..7ab5e48 100644
--- a/ubuntu.md
+++ b/ubuntu.md
@@ -34,8 +34,8 @@ Installer les principaux codecs multimédia propriétaires (mp3, flash, wmv, DVD
 
 Installer driver nvidia recommandé ici `ubuntu-drivers devices`
 
-	sudo apt install nvidia-driver...
-	sudo prime-select nvidia
+	sudo apt install nvidia-driver-...
+	sudo prime-select intel
 
 
 Move home
@@ -95,7 +95,21 @@ In `sudo nano /etc/default/grub`, set `GRUB_TIMEOUT=0`.
 Then `sudo update-grub`.
 
 
+https://askubuntu.com/questions/1166486/how-to-decrease-the-boot-time/1166492#1166492
+	sudo systemctl disable NetworkManager-wait-online.service
+
+
 https://askubuntu.com/questions/1053150/nouveau-modeset0
 
 
+Ubuntu audit
+============
 
+Boot stats:
+
+	systemd-analyze
+	systemd-analyze critical-chain
+	systemd-analyze blame
+
+To see boot errors
+	sudo dmesg -lerr