docs: update framebuffer troubleshooting add fbcp option

docs/Troubleshooting/Framebuffer.md

@@ -1,18 +1,5 @@
 # Screen is using the wrong framebuffer
 
-
-## LCD-show
-
-when using [Waveshare-LCD-show](https://github.com/waveshare/LCD-show) to install screens add `lite` at the end
-to properly install the screen on the lite version of the OS. this will typically change the framebuffer
-
-for example:
-```
-sudo ./LCD35-show lite
-```
-
-## Manually change the framebuffer
-
 If you have multiple framebuffers, you may need to fix the X11 configuration,
 list the available framebuffers and check the current one:
 
@@ -28,6 +15,26 @@ ls /dev/fb*
 !!! failure "Critical"
     if you only see one, for example `/dev/fb0` then this is not the issue. Go to [Troubleshooting](../Troubleshooting.md)
 
+## Use fbcp to copy from one framebuffer to the other
+
+```sh
+cd
+git clone https://github.com/tasanakorn/rpi-fbcp.git
+cd rpi-fbcp
+mkdir build
+cd build
+cmake ..
+make
+sudo install fbcp /usr/local/bin/fbcp
+sudo wget -O /etc/init.d/fbcp https://gist.github.com/notro/eac0fec51cac67bb99c7/raw/4804a36459db10b17d35451d98d4573a045084be/fbcp
+sudo chmod +x /etc/init.d/fbcp
+sudo update-rc.d fbcp defaults
+sudo reboot
+```
+
+## Manually change the framebuffer
+
+
 the file specifying the framebuffer could be:
 
 - 99-fbturbo.conf
@@ -44,12 +51,19 @@ ls /usr/share/X11/xorg.conf.d/
     ***DO NOT CREATE A FILE***, and only edit if there is more than 1 framebuffer
 
 !!! example
-    you found 99-fbturbo.conf:
+    you found 99-fbdev.conf:
 
     ```sh
-    sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf
+    sudo nano /usr/share/X11/xorg.conf.d/99-fbdev.conf
+    ```
+    ``` title="99-fbturbo.conf"
+    Section "Device"
+            Identifier      "Allwinner A10/A13/A20 FBDEV"
+            Driver          "fbdev"
+            Option          "fbdev" "/dev/fb0"
+            Option          "SwapbuffersWait" "true"
+    EndSection
     ```
-    and the file specifies `/dev/fb0`
 
     since `ls /dev/fb*` returned `/dev/fb0 /dev/fb1` change it to `/dev/fb1`