@KuleRucket if you get a chance, could you give a review on this one? Pretty simple change, but want to make sure it won't cause issues in other scenarios.

I like the idea that sunshine can start with the display off, and then be able to use it later if it is switched on. It makes sense and the change works for it.

The RR_Connected state is checked twice in the class, once in x11_display_names() and then once in init(). For Sunshine to start up properly x11_display_names() must return at least one connected display and if none are found then there is an error and x11 get selected as a valid capture method. So the situation described above if relying on the DP-0 to be present. I wonder if this could go one step further and allow 0 displays to be connected and allow them to be switched on later.

The config web page might need to be adjusted though. It say to user "xrandr --listmonitors" which only gives you connected. A new way to retrieve the number you want should be provided. In future we could consider using the monitor name instead of the number.

When you're using just a single monitor, it's usually always connected, so I don't think it's really that important to support "the only monitor is disconnected" case.

But, if you want, I can update this change to remove the remaining RR_Connected check as that shouldn't really break anything (I hope?)

But, if you want, I can update this change to remove the remaining RR_Connected check as that shouldn't really break anything (I hope?)

I think the most important thing is to change the documentation to explain how to get the display number. The easiest way to do this is to change x11_display_names() to list them all with numbers and then the documentation can tell people to check the log file for the display numbers.

I can't see anything wrong with removing the RR_Connected check from x11_display_names(). It will make it easier to print the full list of displays.

Can you add (Connected)/(Disconnected) to the log message using RR_Connected status? If someone it looking for selecting a connected monitor this would help.

Can you add (Connected)/(Disconnected) to the log message using RR_Connected status? If someone it looking for selecting a connected monitor this would help.

Done.

Does something like this look good for docs/web update?

diff --git a/docs/source/about/advanced_usage.rst b/docs/source/about/advanced_usage.rst
index d22555f..19fe237 100644
--- a/docs/source/about/advanced_usage.rst
+++ b/docs/source/about/advanced_usage.rst
@@ -299,13 +299,18 @@ output_name
    .. Tip:: To find the name of the appropriate values follow these instructions.
 
       **Linux**
-         .. code-block:: bash
+         During Sunshine startup, you should see the list of detected monitors:
 
-            xrandr --listmonitors
+         .. code-block:: text
 
-         Example output: ``0: +HDMI-1 1920/518x1200/324+0+0  HDMI-1``
+            Info: Detecting connected monitors
+            Info: Detected monitor 0: DVI-D-0, connected: false
+            Info: Detected monitor 1: HDMI-0, connected: true
+            Info: Detected monitor 2: DP-0, connected: true
+            Info: Detected monitor 3: DP-1, connected: false
+            Info: Detected monitor 4: DVI-D-1, connected: false
 
-         You need to use the value before the colon in the output, e.g. ``0``.
+         You need to use the value before the colon in the output, e.g. ``1``.
 
       .. Todo:: macOS
 
diff --git a/src_assets/common/assets/web/config.html b/src_assets/common/assets/web/config.html
index 9e664ee..9524755 100644
--- a/src_assets/common/assets/web/config.html
+++ b/src_assets/common/assets/web/config.html
@@ -560,9 +560,17 @@
           v-model="config.output_name"
         />
         <div class="form-text">
-          xrandr --listmonitors<br />
-          Example output:
-          <pre>   0: +HDMI-1 1920/518x1200/324+0+0 HDMI-1</pre>
+          During Sunshine startup, you should see the list of detected monitors, e.g.:<br />
+          <br />
+          <pre style="white-space: pre-line;">
+            Info: Detecting connected monitors
+            Info: Detected monitor 0: DVI-D-0, connected: false
+            Info: Detected monitor 1: HDMI-0, connected: true
+            Info: Detected monitor 2: DP-0, connected: true
+            Info: Detected monitor 3: DP-1, connected: false
+            Info: Detected monitor 4: DVI-D-1, connected: false
+          </pre>
+          You need to use the value before the colon in the output, e.g. <b>1</b>.
         </div>
       </div>
     </div>

@luk1337 I think that would be fine.

@luk1337 I think that would be fine.

ok, I pushed it.