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<blockquote data-quote="Scythe42" data-source="post: 944020" data-attributes="member: 95833">The WDDM driver model needs to handle ACPI messages from the hardware. Quick test on NVidia and ATI showed that both pass them properly along the chain to the OS, which then passes them down to individual windows. At least on my two boxes. &nbsp;You don't find them under Windows Messages. You need to read the WDDM SDK include files. It's all nice in there <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite23" alt=":sneaky:" title="Sneaky&nbsp; &nbsp; :sneaky:" loading="lazy" data-shortname=":sneaky:" /> Short view on dispmprt.h will open your eyes <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue&nbsp; &nbsp; :p" loading="lazy" data-shortname=":p" />&nbsp;I can see hotplug, display changes and display power changes fine here. &nbsp;Of course we cannot send commands to HDMI devices without a CEC Module or hooking ourselves into the GPU driver. But we can see what the displays are doing. &nbsp;The initial question was: &quot;Can MP Shutdown, when I turn the TV off?&quot;. Verified -&gt; Possible.</blockquote>

[QUOTE="Scythe42, post: 944020, member: 95833"] The WDDM driver model needs to handle ACPI messages from the hardware. Quick test on NVidia and ATI showed that both pass them properly along the chain to the OS, which then passes them down to individual windows. At least on my two boxes. You don't find them under Windows Messages. You need to read the WDDM SDK include files. It's all nice in there :sneaky: Short view on dispmprt.h will open your eyes :p I can see hotplug, display changes and display power changes fine here. Of course we cannot send commands to HDMI devices without a CEC Module or hooking ourselves into the GPU driver. But we can see what the displays are doing. The initial question was: "Can MP Shutdown, when I turn the TV off?". Verified -> Possible. [/QUOTE]

Verification