diff --git a/nixos/README.md b/nixos/README.md
new file mode 100644
index 0000000..9152e67
--- /dev/null
+++ b/nixos/README.md
@@ -0,0 +1,12 @@
+from time to time run the following commands to remove stuff from old generations
+```
+# list old generations
+sudo nix-env --list-generations --profile /nix/var/nix/profiles/system
+
+# remove old generations
+sudo nix-env --profile /nix/var/nix/profiles/system --delete-generations 9 10 11 12 13 X...
+
+
+# to remove old programs
+nix-collect-garbage --delete-old
+```
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 0ec2343..db698d6 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -83,6 +83,7 @@
 	tig
 	mosh
 	bat
+	lf
 	ripgrep
 	fzf
 	python3
diff --git a/nixos/surface-extra-hardware-configuration.nix b/nixos/surface-extra-hardware-configuration.nix
index e2d33f1..cb163f1 100644
--- a/nixos/surface-extra-hardware-configuration.nix
+++ b/nixos/surface-extra-hardware-configuration.nix
@@ -37,62 +37,65 @@
   # add pulseaudio support to manage audio
   hardware.pulseaudio.enable = true;
 
+  # prevent suspend on folding
+  services.logind.lidSwitch = "ignore";
+
   # next sleep & wake is code from: https://github.com/hpfr/system/blob/2e5b3b967b0436203d7add6adbd6b6f55e87cf3c/hosts/linux-surface.nix
-  systemd.services = {
-    surface-sleep = {
-      enable = lib.versionOlder config.boot.kernelPackages.kernel.version "5.4";
-      before = [ "suspend.target" ];
-      wantedBy = [ "suspend.target" ];
-      serviceConfig.Type = "oneshot";
-      path = with pkgs; [ procps kmod bluez ];
-      script = ''
-        # Disable bluetooth if no device is connected
-        if ps cax | grep bluetoothd && ! bluetoothctl info; then
-          bluetoothctl power off
-        fi
+  # systemd.services = {
+  #   surface-sleep = {
+  #     enable = lib.versionOlder config.boot.kernelPackages.kernel.version "5.4";
+  #     before = [ "suspend.target" ];
+  #     wantedBy = [ "suspend.target" ];
+  #     serviceConfig.Type = "oneshot";
+  #     path = with pkgs; [ procps kmod bluez ];
+  #     script = ''
+  #       # Disable bluetooth if no device is connected
+  #       if ps cax | grep bluetoothd && ! bluetoothctl info; then
+  #         bluetoothctl power off
+  #       fi
 
-        ## Disable bluetooth regardless if devices are connected (see notes below)
-        # if ps cax | grep bluetoothd; then
-        #   bluetoothctl power off
-        # fi
+  #       ## Disable bluetooth regardless if devices are connected (see notes below)
+  #       # if ps cax | grep bluetoothd; then
+  #       #   bluetoothctl power off
+  #       # fi
 
-        ## > Remove IPTS from ME side
-        modprobe -r ipts_surface
-        modprobe -r intel_ipts
-        # modprobe -r mei_hdcp
-        modprobe -r mei_me
-        modprobe -r mei
-        ## > Remove IPTS from i915 side
-        for i in $(find /sys/kernel/debug/dri -name i915_ipts_cleanup); do
-          echo 1 > $i
-        done
-      '';
-    };
-    surface-wake = {
-      enable = lib.versionOlder config.boot.kernelPackages.kernel.version "5.4";
-      after = [ "post-resume.target" ];
-      wantedBy = [ "post-resume.target" ];
-      serviceConfig.Type = "oneshot";
-      path = with pkgs; [ procps kmod bluez ];
-      script = ''
-        ## > Load IPTS from i915 side
-        for i in $(find /sys/kernel/debug/dri -name i915_ipts_init); do
-          echo 1 > $i
-        done
-        ## > Load IPTS from ME side
-        modprobe mei
-        modprobe mei_me
-        # modprobe mei_hdcp
-        modprobe intel_ipts
-        modprobe ipts_surface
+  #       ## > Remove IPTS from ME side
+  #       modprobe -r ipts_surface
+  #       modprobe -r intel_ipts
+  #       # modprobe -r mei_hdcp
+  #       modprobe -r mei_me
+  #       modprobe -r mei
+  #       ## > Remove IPTS from i915 side
+  #       for i in $(find /sys/kernel/debug/dri -name i915_ipts_cleanup); do
+  #         echo 1 > $i
+  #       done
+  #     '';
+  #   };
+  #   surface-wake = {
+  #     enable = lib.versionOlder config.boot.kernelPackages.kernel.version "5.4";
+  #     after = [ "post-resume.target" ];
+  #     wantedBy = [ "post-resume.target" ];
+  #     serviceConfig.Type = "oneshot";
+  #     path = with pkgs; [ procps kmod bluez ];
+  #     script = ''
+  #       ## > Load IPTS from i915 side
+  #       for i in $(find /sys/kernel/debug/dri -name i915_ipts_init); do
+  #         echo 1 > $i
+  #       done
+  #       ## > Load IPTS from ME side
+  #       modprobe mei
+  #       modprobe mei_me
+  #       # modprobe mei_hdcp
+  #       modprobe intel_ipts
+  #       modprobe ipts_surface
 
-        # Restart bluetooth
-        if ps cax | grep bluetoothd; then
-          bluetoothctl power on
-        fi
-      '';
-    };
-  };
+  #       # Restart bluetooth
+  #       if ps cax | grep bluetoothd; then
+  #         bluetoothctl power on
+  #       fi
+  #     '';
+  #   };
+  # };
 
 ## NOTES:
 # Susspend issue: