diff --git a/inventory/inventory.yml b/inventory/inventory.yml
new file mode 100644
index 0000000..456d41d
--- /dev/null
+++ b/inventory/inventory.yml
@@ -0,0 +1,86 @@
+---
+ungrouped:
+  hosts:
+
+R319:
+  hosts:
+    10.190.5.[1:13]:
+R217:
+  hosts:
+    10.190.6.[1:29]:
+R202:
+  hosts:
+    10.190.7.[1:21]:
+R216:
+  hosts:
+    10.190.8.[1:29]:
+R314:
+  hosts:
+    10.190.9.[1:25]:
+R317:
+  hosts:
+    10.190.10.[1:25]:
+R406:
+  hosts:
+    10.190.11.[1:19]:
+R407:
+  hosts:
+    10.190.12.[1:19]:
+
+K200:
+  hosts:
+    10.190.99.41:
+    10.190.99.71:
+    10.190.99.81:
+    10.190.99.91:
+    10.190.99.101:
+    10.190.99.121:
+    10.190.99.141:
+K300:
+  hosts:
+    10.190.98.71:
+    10.190.98.81:
+    10.190.98.101:
+    10.190.98.111:
+    10.190.98.131:
+    10.190.98.161:
+K400:
+  hosts:
+    10.190.97.51:
+    10.190.97.91:
+    10.190.97.101:
+    10.190.97.111:
+    10.190.97.131:
+    10.190.97.141:
+    10.190.97.151:
+
+L200:
+  hosts:
+#    10.190.51.[1:10]:
+L300:
+  hosts:
+#    10.190.52.[1:10]:
+L400:
+  hosts:
+#    10.190.53.[1:10]:
+
+PCroom:
+  children:
+    R202:
+    R216:
+    R217:
+    R314:
+    R317:
+    R319:
+    R406:
+    R407:
+Kroom:
+  children:
+    K200:
+    K300:
+    K400:
+Lroom:
+  children:
+    L200:
+    L300:
+    L400:
diff --git a/roles/lmn_kde/tasks/main.yml b/roles/lmn_kde/tasks/main.yml
index 8026074..ae8a6e6 100644
--- a/roles/lmn_kde/tasks/main.yml
+++ b/roles/lmn_kde/tasks/main.yml
@@ -1,13 +1,22 @@
 ---
-- name: install desktop EDU packages and some more
+- name: Provide sqlite backend to skip mysql installation later
+  apt:
+    name:
+      - akonadi-backend-sqlite
+    state: latest
+  environment:
+    http_proxy: http://firewall.pn.steinbeis.schule:3128
+    https_proxy: http://firewall.pn.steinbeis.schule:3128
+
+- name: Install desktop EDU packages and some more
   apt:
     name:
       - task-kde-desktop
       - task-german-kde-desktop
       - task-german-desktop
       - xdg-desktop-portal-kde
+      - xdg-desktop-portal-wlr # share screen in browser
       - kde-full
-      - akonadi-backend-sqlite
       - atftp
       - thunderbird-l10n-de
       - webext-privacy-badger
@@ -57,14 +66,14 @@
     http_proxy: http://firewall.pn.steinbeis.schule:3128
     https_proxy: http://firewall.pn.steinbeis.schule:3128
 
-- name: add {{ ansible_distribution_release }}-backports
+- name: Add {{ ansible_distribution_release }}-backports
   apt_repository:
     repo: deb http://deb.debian.org/debian/ {{ ansible_distribution_release }}-backports main contrib non-free
     state: present
     update_cache: true
   when: ansible_distribution_release == 'bullseye'
 
-- name: install extra packages from backports
+- name: Install extra packages from backports
   apt:
     name:
       - libreoffice