Cynary
commented
2 months ago I have a similar issue that may have the same underlying cause, but should be easier to reproduce since it doesn't require a second CPU.
I'm trying to script the setup/teardown of a virtual display (this is for some streaming-related automation), and for the virtual display I'm using https://github.com/itsmikethetech/Virtual-Display-Driver.
When I don't have the virtual device, I just have a single graphics card, and everything looks and works well:
Display ID Description Active Enabled Primary Resolution HDR Info Position Recommended Resolution Source Target
---------- ----------- ------ ------- ------- ---------- -------- -------- ---------------------- ------ ------
0-4353 AW3423DWF via NVIDIA True True False Width : 3440 HdrSupported : True X : -3440 Width : 3440 Id : 0 Id : 4353
GeForce RTX 4090 Height : 1440 HdrEnabled : True Y : 0 Height : 1440 Name : \\.\DISPLAY1 FriendlyName : AW3423DWF
RefreshRate : 165 BitDepth : 10 Description : NVIDIA ConnectionType :
GeForce RTX 4090 DisplayportExternal
1-4352 DENON-AVR via NVIDIA True True True Width : 3840 HdrSupported : True X : 0 Width : 3840 Id : 1 Id : 4352
GeForce RTX 4090 Height : 2160 HdrEnabled : True Y : 0 Height : 2160 Name : \\.\DISPLAY2 FriendlyName : DENON-AVR
RefreshRate : 120 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
2 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 2 None
GeForce RTX 4090 Name : \\.\DISPLAY3
source Description : NVIDIA
GeForce RTX 4090
3 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 3 None
GeForce RTX 4090 Name : \\.\DISPLAY4
source Description : NVIDIA
GeForce RTX 4090(for the following examples, I will always keep the DENON-AVR display enabled)
When I add it as a device, the output from GetAllPotentialDisplays gets wonky, and controls weird - also, what we see in that output depends on which displays are enabled via settings.
Here's the output when both the alienware and the virtual display are enabled, and the virtual display is the primary:
Display ID Description Active Enabled Primary Resolution HDR Info Position Recommended Resolution Source Target
---------- ----------- ------ ------- ------- ---------- -------- -------- ---------------------- ------ ------
0-256 IDD HDR via NVIDIA True True False Width : 3440 HdrSupported : True X : -3440 Width : 1280 Id : 0 Id : 256
GeForce RTX 4090 Height : 1440 HdrEnabled : False Y : 0 Height : 800 Name : \\.\DISPLAY1 FriendlyName : IDD HDR
RefreshRate : 60 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
1-4352 DENON-AVR via NVIDIA True True False Width : 3840 HdrSupported : True X : 1280 Width : 3840 Id : 1 Id : 4352
GeForce RTX 4090 Height : 2160 HdrEnabled : True Y : 0 Height : 2160 Name : \\.\DISPLAY2 FriendlyName : DENON-AVR
RefreshRate : 60 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
2 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 2 None
GeForce RTX 4090 Name : \\.\DISPLAY3
source Description : NVIDIA
GeForce RTX 4090
3 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 3 None
GeForce RTX 4090 Name : \\.\DISPLAY4
source Description : NVIDIA
GeForce RTX 4090
4 Unconnected True False True Width : 1280 N/A X : 0 N/A Id : 4 None
IddSampleDriver Height : 800 Y : 0 Name : \\.\DISPLAY15
Device HDR source RefreshRate : 60 Description :
IddSampleDriver Device HDRHere's the output when both are enabled, and the alienware is the primary:
Display ID Description Active Enabled Primary Resolution HDR Info Position Recommended Resolution Source Target
---------- ----------- ------ ------- ------- ---------- -------- -------- ---------------------- ------ ------
0-256 IDD HDR via NVIDIA True True True Width : 3440 HdrSupported : True X : 0 Width : 1280 Id : 0 Id : 256
GeForce RTX 4090 Height : 1440 HdrEnabled : False Y : 0 Height : 800 Name : \\.\DISPLAY1 FriendlyName : IDD HDR
RefreshRate : 60 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
1-4352 DENON-AVR via NVIDIA True True False Width : 3840 HdrSupported : True X : 4720 Width : 3840 Id : 1 Id : 4352
GeForce RTX 4090 Height : 2160 HdrEnabled : True Y : 0 Height : 2160 Name : \\.\DISPLAY2 FriendlyName : DENON-AVR
RefreshRate : 60 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
2 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 2 None
GeForce RTX 4090 Name : \\.\DISPLAY3
source Description : NVIDIA
GeForce RTX 4090
3 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 3 None
GeForce RTX 4090 Name : \\.\DISPLAY4
source Description : NVIDIA
GeForce RTX 4090
4 Unconnected True False False Width : 1280 N/A X : 3440 N/A Id : 4 None
IddSampleDriver Height : 800 Y : 0 Name : \\.\DISPLAY15
Device HDR source RefreshRate : 60 Description :
IddSampleDriver Device HDRHere's the output when only the alienware is enabled:
Display ID Description Active Enabled Primary Resolution HDR Info Position Recommended Resolution Source Target
---------- ----------- ------ ------- ------- ---------- -------- -------- ---------------------- ------ ------
0-4353 AW3423DWF via NVIDIA True True False Width : 3440 HdrSupported : True X : -3440 Width : 3440 Id : 0 Id : 4353
GeForce RTX 4090 Height : 1440 HdrEnabled : True Y : 0 Height : 1440 Name : \\.\DISPLAY1 FriendlyName : AW3423DWF
RefreshRate : 165 BitDepth : 10 Description : NVIDIA ConnectionType :
GeForce RTX 4090 DisplayportExternal
1-4352 DENON-AVR via NVIDIA True True True Width : 3840 HdrSupported : True X : 0 Width : 3840 Id : 1 Id : 4352
GeForce RTX 4090 Height : 2160 HdrEnabled : True Y : 0 Height : 2160 Name : \\.\DISPLAY2 FriendlyName : DENON-AVR
RefreshRate : 120 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
2 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 2 None
GeForce RTX 4090 Name : \\.\DISPLAY3
source Description : NVIDIA
GeForce RTX 4090
3 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 3 None
GeForce RTX 4090 Name : \\.\DISPLAY4
source Description : NVIDIA
GeForce RTX 4090
4 Unconnected False False False N/A N/A N/A N/A Id : 4 None
IddSampleDriver Name : \\.\DISPLAY15
Device HDR source Description :
IddSampleDriver Device HDRHere's the output when neither is enabled:
Display ID Description Active Enabled Primary Resolution HDR Info Position Recommended Resolution Source Target
---------- ----------- ------ ------- ------- ---------- -------- -------- ---------------------- ------ ------
0 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 0 None
GeForce RTX 4090 Name : \\.\DISPLAY1
source Description : NVIDIA
GeForce RTX 4090
1-4352 DENON-AVR via NVIDIA True True True Width : 3840 HdrSupported : True X : 0 Width : 3840 Id : 1 Id : 4352
GeForce RTX 4090 Height : 2160 HdrEnabled : True Y : 0 Height : 2160 Name : \\.\DISPLAY2 FriendlyName : DENON-AVR
RefreshRate : 120 BitDepth : 10 Description : NVIDIA ConnectionType : Hdmi
GeForce RTX 4090
2 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 2 None
GeForce RTX 4090 Name : \\.\DISPLAY3
source Description : NVIDIA
GeForce RTX 4090
3 Unconnected NVIDIA False False False N/A N/A N/A N/A Id : 3 None
GeForce RTX 4090 Name : \\.\DISPLAY4
source Description : NVIDIA
GeForce RTX 4090
4 Unconnected False False False N/A N/A N/A N/A Id : 4 None
IddSampleDriver Name : \\.\DISPLAY15
Device HDR source Description :
IddSampleDriver Device HDRIt kind of looks/feels like the 0-indexed display becomes a mix of two displays, though the virtual monitor is also on the index-4 - enabling/disabling/enabling HDR/disabling HDR work on display 0 if I grab the output of GetAllPotentialDisplays when only one of the displays is active. If both displays are active, enable/disable seems to act on both displays (in that it lets me disable the alienware monitor, though it doesn't let me reenable it). Setting the resolution, however, is a different story - setting the resolution of display 0 only affects the alienware monitor, whereas I can set the resolution for the virtual monitor on display 4.
I tried to look a little deeper into this, and when I tried to get the list of paths for index 0 (following the code in _GetDisplay), this is what I got:
[
{
"sourceInfo": {
"adapterId": "DisplayConfig+LUID",
"id": 1,
"modeInfoIdx": 1,
"statusFlags": 1
},
"targetInfo": {
"adapterId": "DisplayConfig+LUID",
"id": 4352,
"modeInfoIdx": 0,
"outputTechnology": 5,
"rotation": 1,
"scaling": 1,
"refreshRate": "DisplayConfig+DisplayConfigRational",
"scanLineOrdering": 1,
"targetAvailable": true,
"statusFlags": 1
},
"flags": 1
},
{
"sourceInfo": {
"adapterId": "DisplayConfig+LUID",
"id": 0,
"modeInfoIdx": 3,
"statusFlags": 1
},
"targetInfo": {
"adapterId": "DisplayConfig+LUID",
"id": 256,
"modeInfoIdx": 2,
"outputTechnology": 5,
"rotation": 1,
"scaling": 1,
"refreshRate": "DisplayConfig+DisplayConfigRational",
"scanLineOrdering": 1,
"targetAvailable": true,
"statusFlags": 1
},
"flags": 1
}
]This looks very similar to the issue reported with 2 gpus - the module output seems to suggests both gpus have a monitor at index 0, so the module ends up mixing them up in weird ways. Hopefully using virtual monitor this is easier to reproduce, and can lead to a fix.
journeym
I have one monitor connected to PCIE Nvidia card, and another to iGPU. This module gives me incorrect data with GetEnabledDisplays (shows only monitor connected to the igpu but with incorrect connection data)
GetAllPotentialDisplays gives me this.
MSI MD271CPW is actually connected to radeon igpu, and on nvidia i have LG Ultragear.