wizard: create a serial only config

Author: osy

Platform/Shared/VMWizardHardwareView.swift

@@ -108,10 +108,16 @@ struct VMWizardHardwareView: View {
 
 
             if !wizardState.useAppleVirtualization && wizardState.operatingSystem == .Linux {
-                DetailedSection("Hardware OpenGL Acceleration", description: "There are known issues in some newer Linux drivers including black screen, broken compositing, and apps failing to render.") {
+                DetailedSection("Disply Output", description: "There are known issues in some newer Linux drivers including black screen, broken compositing, and apps failing to render.") {
+                    Toggle("Enable display output", isOn: $wizardState.isDisplayEnabled)
+                        .onChange(of: wizardState.isDisplayEnabled) { newValue in
+                            if !newValue {
+                                wizardState.isGLEnabled = false
+                            }
+                        }
                     Toggle("Enable hardware OpenGL acceleration", isOn: $wizardState.isGLEnabled)
+                        .disabled(!wizardState.isDisplayEnabled)
                 }
-                
             }
         }
         .textFieldStyle(.roundedBorder)

Platform/Shared/VMWizardState.swift

@@ -142,6 +142,7 @@ struct AlertMessage: Identifiable {
     @Published var storageSizeGib: Int = 8
     #endif
     @Published var systemCpuCount: Int = 0
+    @Published var isDisplayEnabled: Bool = true
     @Published var isGLEnabled: Bool = false
     @Published var sharingDirectoryURL: URL?
     @Published var sharingReadOnly: Bool = false
@@ -466,6 +467,11 @@ struct AlertMessage: Identifiable {
                 config.displays[0].hardware = AnyQEMUConstant(rawValue: newCard)!
             }
         }
+        if operatingSystem == .Linux && !isDisplayEnabled {
+            config.displays = []
+            let newSerial = UTMQemuConfigurationSerial(forArchitecture: systemArchitecture, target: systemTarget)!
+            config.serials = [newSerial]
+        }
         let mainDriveInterface: QEMUDriveInterface
         if systemArchitecture == .aarch64 && operatingSystem == .Windows {
             mainDriveInterface = .nvme