Why do I get empty for screen resolution in PowerShell on Windows 10?

Question

I type the command in Get Screen resolution using WMI/powershell in Windows 7, but I get empty result (I'm on Surface Pro 2017, single screen)?

What do you get for this? `Get-WmiObject -Class Win32_Desktopmonitor` — Sid, Jul 21 '18 at 07:57
@RohinSidharth empty also DeviceID : DesktopMonitor1 DisplayType : MonitorManufacturer : Surface Name : Surface Display ScreenHeight : ScreenWidth : — user310291, Jul 21 '18 at 08:39
@ansgarwiechers why is my question voted to close just because nobody knows the answer about wmi ? I know there is alternative with winform but that's not my question, my question is about wmi. — user310291, Jul 21 '18 at 14:19
@user310291 You need to ask that the person who close-voted this question. — Ansgar Wiechers, Jul 21 '18 at 14:50
@AnsgarWiechers is there a way to know who downvoted though ? — user310291, Jul 23 '18 at 00:47

Theo · Accepted Answer · 2018-07-21T15:26:03.807

4

I don't have a Surface, but does this work?

Add-Type -AssemblyName System.Windows.Forms
$screen = [System.Windows.Forms.Screen]::PrimaryScreen
[pscustomobject]@{
    DeviceName   = $screen.DeviceName.Split('\\')[-1]
    Width        = $screen.Bounds.Width
    Height       = $screen.Bounds.Height
    BitsPerPixel = $screen.BitsPerPixel
}

EDIT

Using CIM_VideoController

$screen = Get-CimInstance -ClassName CIM_VideoController
[pscustomobject]@{
    DeviceName   = $screen.Caption
    Width        = $screen.CurrentHorizontalResolution
    Height       = $screen.CurrentVerticalResolution
    BitsPerPixel = $screen.CurrentBitsPerPixel
}

edited Jul 21 '18 at 15:26

answered Jul 21 '18 at 09:55

Theo

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yes it works and I know it works but my question is about wmi ;) – user310291 Jul 21 '18 at 14:17
Apparently, starting with Windows Vista, hardware that is not compatible with Longhorn Display Driver Model (LDDM) returns inaccurate property values for instances of this class. Instead, you can use the `CIM_VideoController` object and get properties `CurrentHorizontalResolution`, `CurrentVerticalResolution` and `CurrentBitsPerPixel` from that (and more). Usage `Get-CimInstance -ClassName CIM_VideoController` – Theo Jul 21 '18 at 15:19
I'm on a Surface Pro 3 (Windows 10 Build 17713) and `Get-WmiObject -Class Win32_Desktopmonitor` correctly returns `ScreenWidth : 2160 ScreenHeight : 1440` – Jacob Jul 21 '18 at 17:38
@Jacob well that's ironic that old version of surface works ;) – user310291 Jul 23 '18 at 00:42
@Theo CIM_VideoController returns something : 2736 1824 which are maximum resolution I guess whereas my current resolution is set lower. But since that's also an interesting info, I'll check as good answer :) – user310291 Jul 23 '18 at 00:46

Why do I get empty for screen resolution in PowerShell on Windows 10?

1 Answers1