diff --git a/README.md b/README.md
index 6fcacf8..92e85ab 100644
--- a/README.md
+++ b/README.md
@@ -34,9 +34,9 @@ You need to **relogin** if you install virt-manager (libvirt) first time.
 
 ## Generate resolution
 
-By default uses 3840x2160. If you need to regenerate `appvm/nix/monitor.nix`:
+By default uses 1920x1080. If you need to regenerate `appvm/nix/monitor.nix`:
 
-    $ $GOPATH/github.com/jollheef/appvm/generate-resolution.sh 1920 1080 > $GOPATH/github.com/jollheef/appvm/nix/monitor.nix
+    $ $GOPATH/src/github.com/jollheef/appvm/generate-resolution.sh 3840 2160 > $GOPATH/src/github.com/jollheef/appvm/nix/monitor.nix
 
 Autodetection is a bash-spaghetti, so you need to check results. BTW it's just a X.org monitor section.
 
diff --git a/generate-resolution.sh b/generate-resolution.sh
index 88c4d1c..7c814be 100755
--- a/generate-resolution.sh
+++ b/generate-resolution.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 if [[ "$1" == "" || "$2" == "" ]]; then
     echo -e "Usage:\t$0 X Y"
diff --git a/nix/monitor.nix b/nix/monitor.nix
index 8caebd1..6d18d00 100644
--- a/nix/monitor.nix
+++ b/nix/monitor.nix
@@ -1,7 +1,6 @@
 {
   services.xserver.monitorSection = ''
-     Modeline "3840x2160_60.00" 712.75 3840 4160 4576 5312 2160 2163 2168 2237 -hsync +vsync
-     Option "PreferredMode" "3840x2160_60.00"
-     DisplaySize 610 350
+     Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
+     Option "PreferredMode" "1920x1080_60.00"
   '';
 }