Unreal Engine Issues and Bug Tracker (UE-82613)

Description

When using "Get Supported Fullscreen Resolutions" on UE when built with Vulkan, no values are printed out. This is an issue with any platform that builds UE with -vulkan, not just Linux.

In Engine/Source/Runtime/VulkanRHI/Private/VulkanRHI.cpp, the function RHIGetAvailableResolutions() is stubbed. Implementing this fixes the issue. RHIGetSupportedResolution() in the same location is also stubbed. VK_KHR_display should be able to handle this in a platform-generic way, otherwise we'll need to split the task per platform.

This was reported and tested on 4.23.1 (CL-9631420). This was reproduced on 4.22.3 (CL-7053642), 4.24 (CL-9850156), and Main 4.25 (CL-9848873).

Steps to Reproduce

Open the UE5 Editor and create a Blank template project
Open the level blueprint like so:
[Image Removed]
Recreate the blueprint in the image below or copy the block of text at the bottom of this field and paste it into the blueprint viewport
Save the Blueprint and Map
Play in Editor, hit the F key to print the output.

Results: The string "false" is printed

Expected: The string "true" is printed, indicating the array output by the "Get Supported Fullscreen Resolutions" node was successfully filled.

Blueprint:

[Image Removed]

Blueprint code:

Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_2"
   FunctionReference=(MemberParent=Class'"/Script/Engine.KismetSystemLibrary"',MemberName="PrintString")
   NodePosX=-192
   NodePosY=442
   AdvancedPinDisplay=Hidden
   EnabledState=DevelopmentOnly
   NodeGuid=8516C100C9CF4DCE9F7263454067DC2D
   CustomProperties Pin (PinId=1869A46F44CD211DD100D29237D459C9,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(K2Node_CallFunction_0 9F5FFFD541BCCDFC25FD43B3A67B43D3,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=067BCE7145112157A709EEA84F6284EF,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=CA108F2949D8C55F726A90AFE206D497,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nKismet System Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/Engine.KismetSystemLibrary"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultObject="/Script/Engine.Default__KismetSystemLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=5744FE8643E9D08C4460408532CFB13C,PinName="WorldContextObject",PinToolTip="World Context Object\nObject Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/CoreUObject.Object"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=True,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=3A780451444E42451393FC82090FDF09,PinName="InString",PinToolTip="In String\nString\n\nThe string to log out",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="Hello",AutogeneratedDefaultValue="Hello",LinkedTo=(K2Node_CallFunction_9 24BF26C45C2C4B22BA05DAD05ACB0C0B,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=B4F3569D45CBA1EBCB9061AECBBCD494,PinName="bPrintToScreen",PinToolTip="Print to Screen\nBoolean\n\nWhether or not to print the output to the screen",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="true",AutogeneratedDefaultValue="true",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
   CustomProperties Pin (PinId=FB402C084DA5E650981FBA9DF8BBBC28,PinName="bPrintToLog",PinToolTip="Print to Log\nBoolean\n\nWhether or not to print the output to the log",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="true",AutogeneratedDefaultValue="true",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
   CustomProperties Pin (PinId=DEB02AA640F5760BDDBDEFBCB5ECDC2B,PinName="TextColor",PinToolTip="Text Color\nLinear Color Structure\n\nThe color of the text to display",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/CoreUObject.LinearColor"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="(R=0.000000,G=0.660000,B=1.000000,A=1.000000)",AutogeneratedDefaultValue="(R=0.000000,G=0.660000,B=1.000000,A=1.000000)",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
   CustomProperties Pin (PinId=4C2FA0D74BA20C1D5CE48BA14A7B79FD,PinName="Duration",PinToolTip="Duration\nFloat\n\nThe display duration (if Print to Screen is True). Using negative number will result in loading the duration time from the config.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="5.000000",AutogeneratedDefaultValue="2.000000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
   CustomProperties Pin (PinId=2068A0E03D904B77822C0E62065839EF,PinName="Key",PinToolTip="Key\nName\n\nIf a non-empty key is provided, the message will replace any existing on-screen messages with the same key.",PinType.PinCategory="name",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=True,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="None",AutogeneratedDefaultValue="None",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_InputKey Name="K2Node_InputKey_2"
   InputKey=F
   NodePosX=-752
   NodePosY=416
   NodeGuid=CF255FAA128E4ECB9ACF187DDA0BCB31
   CustomProperties Pin (PinId=50262B70179740DA99998836C23C5340,PinName="Pressed",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(K2Node_CallFunction_0 5EDE891E4CEDC90CD8DE08888FDAA2D2,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=53FB9BBE594C4CC3B46C2D0DFF3204FC,PinName="Released",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=02B62C3D2A6F4FF98F4874456D24AEA9,PinName="Key",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/InputCore.Key"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="None",AutogeneratedDefaultValue="None",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_0"
   FunctionReference=(MemberParent=Class'"/Script/Engine.KismetSystemLibrary"',MemberName="GetSupportedFullscreenResolutions")
   NodePosX=-640
   NodePosY=416
   ErrorType=1
   NodeGuid=8E382A866355431D8A084A5E1AAB4C18
   CustomProperties Pin (PinId=5EDE891E4CEDC90CD8DE08888FDAA2D2,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(K2Node_InputKey_2 50262B70179740DA99998836C23C5340,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=9F5FFFD541BCCDFC25FD43B3A67B43D3,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(K2Node_CallFunction_2 1869A46F44CD211DD100D29237D459C9,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=6F8E369044A4C2CB0540AE9E630774A5,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nKismet System Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/Engine.KismetSystemLibrary"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultObject="/Script/Engine.Default__KismetSystemLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=83445C784C2A679ABCCD739EAFBA7BD2,PinName="Resolutions",PinToolTip="Resolutions\nArray of Int Point Structures",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/CoreUObject.IntPoint"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=Array,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=6090C65542770685BCB73FBAFC4ABF67,PinName="ReturnValue",PinToolTip="Return Value\nBoolean\n\ntrue if successfully queried the device for available resolutions.",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_9 7A085CB1B37A412FB2C1A336CB90498F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_9"
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'"/Script/Engine.KismetStringLibrary"',MemberName="Conv_BoolToString")
   NodePosX=-336
   NodePosY=491
   NodeGuid=95BCE4C2584B4C8C82A8DACF7A4470A4
   CustomProperties Pin (PinId=7B064AD691CB444DAAEE2702BD2ECE28,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nKismet String Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/Engine.KismetStringLibrary"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultObject="/Script/Engine.Default__KismetStringLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=7A085CB1B37A412FB2C1A336CB90498F,PinName="InBool",PinToolTip="In Bool\nBoolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_0 6090C65542770685BCB73FBAFC4ABF67,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=24BF26C45C2C4B22BA05DAD05ACB0C0B,PinName="ReturnValue",PinToolTip="Return Value\nString\n\nConverts a boolean value to a string, either \'true\' or \'false\'",Direction="EGPD_Output",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(K2Node_CallFunction_2 3A780451444E42451393FC82090FDF09,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object

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Unresolved

Component	UE - Rendering Architecture - RHI
Affects Versions	4.23.1, 4.24, 4.22.3, 4.25, 5.0
Target Fix	5.6

Created	Oct 28, 2019
Updated	Sep 27, 2024

View Jira Issue

UE-82613

Getting Fullscreen or Windowed Resolutions doesn't fully execute on Linux

Getting Fullscreen or Windowed Resolutions doesn't fully execute on Linux

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