add Workaround for Nitropads with Ubuntu 24.04

nitropad/ubuntu/index.rst

@@ -3,6 +3,28 @@ NitroPad with Ubuntu Linux
 
 .. include:: ../content/shared-index-content1.rst
 
+Workaround Ubuntu 24.04.
+------------------------
+
+There is an (`issue <https://github.com/linuxboot/heads/issues/1641>`__)that prevents Ubuntu to show the luks decryption screen if started with heads. Its there and you can type in your password blindly, after that Ubuntu starts normal. 
+Follow these Steps: 
+
+1. Heads starts. If nothing needs to be done, Ubuntu will start automatically
+
+2. After a while, you will see a black screen with white writing on the last lines:         
+
+.. code-block::
+
+   Locking TPM2 platform hierarchy...  
+   Starting the new kernel
+
+
+These lines indicate that Ubuntu is starting.
+
+3. Wait **5 seconds** and then enter your **password** ("12345678" if you are starting it for the first time) followed by **Enter**.
+
+4. Now you will see the normal Ubuntu screen. When you start for the first time, you must complete the initial configuration. 
+
 Getting Started
 ---------------