update

docs/multiport.md

@@ -29,12 +29,7 @@ You can order PiKVM Switch Multiport Extender from our [international store](htt
 Canadian customers can place an order at [PiShop.ca](https://www.pishop.ca/product/pikvm-switch-multiport-extender/).
 
 
-If your KVM switches channels using keyboard shortcuts, there is a chance that it will not be able to work with OTG (v2+ platform, see below), since it does not fully implement the USB stack. In this case, you will have to [use the Pico HID](pico_hid.md) to emulate the keyboard & mouse (PiKVM supports this configuration).
-
-!!! warning
-    If you choose AIMOS, be aware that it has a back powering issue that you need to use work arounds for. Limitations are are listed below. Also please be aware that Pico's will not work with the AIMOS KVM's.
-
-   
+----- 
 ## List of tested third-party KVMs
 
 There are many ways to do this with third-party switches. For example you can choose a switch with USB control connection like [ezCoo KVM switch](ezcoo.md).

docs/switch.md

@@ -215,3 +215,39 @@ Just run these commands via SSH under root:
 ```
 
 The switches will show the progress of the update on the front LEDs and will gradually return to service.
+
+
+-----
+## Known issues
+
+??? info "A DIY PiKVM device based on HDMI-CSI board does not receive a video through the Switch"
+
+    Some HDMI-CSI boards does not follow the HDMI specification correctly.
+    We have provided a special compatibility mode for them,
+    which should be enabled using the following configuration:
+
+    1. Switch filesystem to RW-mode:
+
+        ```console
+        [root@pikvm ~]# rw
+        ```
+
+    2. Add some lines to `/etc/kvmd/override.yaml`:
+
+        ```yaml
+        kvmd:
+            switch:
+                ignore_hpd_on_top: true
+        ```
+
+    3. Restart KVMD:
+
+        ```yaml
+        [root@pikvm ~]# systemctl restart kvmd
+        ```
+
+    4. Switch filesystem back to RO-mode:
+
+        ```console
+        [root@pikvm ~]# ro
+        ```