Add GDM instructions and move images

README.md

@@ -6,7 +6,7 @@ This was done on the initial IndieGoGo-release of the Win 3. The limited-edition
 
 **I currently run Ubuntu 21.04 on my GPD Win 3, issues may vary and scripts break if you use different distros.**
 
-![Photo of GPD Win 3 running Linux](win3-lin.jpg)
+![Photo of GPD Win 3 running Linux](img/win3-lin.jpg)
 
 # System "requirements"
 

docs/Main-issues.md

@@ -66,4 +66,50 @@ sudo modprobe -r goodix
 sudo modprobe goodix
 ```
 
-The touchscreen then starts working, it keeps working after sleep/suspend as well. But you will need to run these commands after every reboot.
+The touchscreen then starts working, it keeps working after sleep/suspend as well. But you will need to run these commands after every reboot.
+
+# Rotate GDM (Sign-in screen)
+
+GDM keeps its own display settings, so it's not as straight forward to rotate/scale as the desktop.
+
+You can either copy your own settings over so GDM works the same by running this command:
+
+```
+sudo cp ~/.config/monitors.xml /var/lib/gdm3/.config/
+```
+
+Or you can create the file `/var/lib/gdm3/.config/monitors.xml` and input my settings:
+
+```
+<monitors version="2">
+  <configuration>
+    <logicalmonitor>
+      <x>0</x>
+      <y>0</y>
+      <scale>1</scale>
+      <primary>yes</primary>
+      <transform>
+        <rotation>right</rotation>
+        <flipped>no</flipped>
+      </transform>
+      <monitor>
+        <monitorspec>
+          <connector>DSI-1</connector>
+          <vendor>unknown</vendor>
+          <product>unknown</product>
+          <serial>unknown</serial>
+        </monitorspec>
+        <mode>
+          <width>720</width>
+          <height>1280</height>
+          <rate>60.000682830810547</rate>
+        </mode>
+      </monitor>
+    </logicalmonitor>
+  </configuration>
+</monitors>
+```
+
+This will also leave GDM with 2x scaling, which makes for a rather beautiful and properly rotated login screen:
+
+![Photo of GPD Win 3 at sign-in screen](../img/win3-login-2x.jpg)