View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000612||madVR||bug||public||2019-07-20 17:33||2019-08-03 23:11|
|OS||Windows 10||OS Version||1903|
|Summary||0000612: NVAPI HDR does not activate on primary display but works on secondary display|
|Description||I have two HDR capable displays:|
Acer Predator X27 (Primary, DisplayPort, G-SYNC HDR)
LG B7 (Secondary, HDMI 2.0)
HDR is switched off in Windows for both displays.
When setting the desktop to "Second screen only" to use the LG B7, madVR is able to use NVNAPI to switch on HDR automatically.
However when setting the desktop to "PC screen only" or "Extend" to use the Predator X7, madVR is unable to switch on HDR automatically. I must switch on HDR in Windows manually for this monitor. I'm not sure if the correct HDR metadata is even being sent to the display.
|Tags||No tags attached.|
|Media Player (with version info)||MPC-BE (64-bit) 1.5.3 (build 4488)|
|Splitter (with version info)||LAV Splitter 0.74.1|
|Decoder (with version info)||LAV Video Decoder 0.74.1|
|DXVA2 Scaling Active||no|
|Aero / Desktop Composition||On|
|Problem occurs with mode||fullscreen exclusive mode|
|GPU Model||GeForce RTX 2080 Ti|
|GPU Driver Version||431.36|
I noticed in madVR Settings > Devices that the Predator X7 entry does not become bold, indicating madVR does not think it's running on the display at all.
Each time I launch madVR it creates a new "Identification <N>" under the device, and there is a huge list of old entries.
The "Display Modes" settings also have no effect on this monitor, further confirming madVR is not correctly detecting that it's running on this display.
I found the cause of the bug. I have a 3rd physically unplugged display configured in madVR which I rarely use. However the presence of this display in the "devices" list causes madVR to malfunction and apply this display's settings (display modes, 3D LUT, etc) to the primary display. Deleting this entry from madVR while the display is unplugged makes the primary display settings start working. However this is still a bug because I need to reconfigure the 3rd display in madVR each time I plug it in.