Heap adjustments

- Increase heap limit to 8 GiB for games that crash with > 8 GiB heap. This was inadvertently limited to 6 GiB for 10 & 12 GiB DRAM sizes.

Directory.Packages.props

@@ -38,7 +38,7 @@
     <PackageVersion Include="Ryujinx.Graphics.Nvdec.Dependencies.Windows" Version="6.1.4-build6" />
     <PackageVersion Include="Ryujinx.Graphics.Vulkan.MoltenVK" Version="1.4.3-ryujinx.1" />
     <PackageVersion Include="Ryujinx.LibHac" Version="0.21.0-alpha.133" />
-    <PackageVersion Include="Ryujinx.SDL3-CS" Version="2026.707.0" />
+    <PackageVersion Include="Ryujinx.SDL3-CS" Version="2026.918.0" />
     <PackageVersion Include="securifybv.ShellLink" Version="0.1.0" />
     <PackageVersion Include="SharpZipLib" Version="1.4.2" />
     <PackageVersion Include="Silk.NET.Shaderc" Version="2.23.0" />

src/Ryujinx.HLE/HOS/Applets/Error/ErrorApplet.cs

@@ -166,13 +166,15 @@ namespace Ryujinx.HLE.HOS.Applets.Error
 
             string[] buttons = GetButtonsText(module, description, "DlgBtn");
 
-            bool showDetails = _horizon.Device.UIHandler.DisplayErrorAppletDialog($"Error Code: {module}-{description:0000}", "\n" + message, buttons);
+            (uint Module, uint Description) errorCodeTuple = (module, uint.Parse(description.ToString("0000")));
+
+            bool showDetails = _horizon.Device.UIHandler.DisplayErrorAppletDialog($"Error Code: {module}-{description:0000}", "\n" + message, buttons, errorCodeTuple);
             if (showDetails)
             {
                 message = GetMessageText(module, description, "FlvMsg");
                 buttons = GetButtonsText(module, description, "FlvBtn");
 
-                _horizon.Device.UIHandler.DisplayErrorAppletDialog($"Details: {module}-{description:0000}", "\n" + message, buttons);
+                _horizon.Device.UIHandler.DisplayErrorAppletDialog($"Details: {module}-{description:0000}", "\n" + message, buttons, errorCodeTuple);
             }
         }
 

src/Ryujinx.HLE/HOS/Applets/PlayerSelect/PlayerSelectApplet.cs

@@ -27,9 +27,19 @@ namespace Ryujinx.HLE.HOS.Applets
             _normalSession = normalSession;
             _interactiveSession = interactiveSession;
 
-            // TODO(jduncanator): Parse PlayerSelectConfig from input data
+            UserProfile selected = _system.Device.UIHandler.ShowPlayerSelectDialog();
+            if (selected == null)
+            {
                 _normalSession.Push(BuildResponse());
-
+            }
+            else if (selected.UserId == new UserId("00000000000000000000000000000080"))
+            {
+                _normalSession.Push(BuildGuestResponse());
+            }
+            else
+            {
+                _normalSession.Push(BuildResponse(selected));
+            }
             AppletStateChanged?.Invoke(this, null);
 
             _system.ReturnFocus();
@@ -37,16 +47,34 @@ namespace Ryujinx.HLE.HOS.Applets
             return ResultCode.Success;
         }
 
-        private byte[] BuildResponse()
+        private byte[] BuildResponse(UserProfile selectedUser)
         {
-            UserProfile currentUser = _system.AccountManager.LastOpenedUser;
-
             using MemoryStream stream = MemoryStreamManager.Shared.GetStream();
             using BinaryWriter writer = new(stream);
 
             writer.Write((ulong)PlayerSelectResult.Success);
 
-            currentUser.UserId.Write(writer);
+            selectedUser.UserId.Write(writer);
+
+            return stream.ToArray();
+        }
+
+        private byte[] BuildGuestResponse()
+        {
+            using MemoryStream stream = MemoryStreamManager.Shared.GetStream();
+            using BinaryWriter writer = new(stream);
+
+            writer.Write(new byte());
+
+            return stream.ToArray();
+        }
+        
+        private byte[] BuildResponse()
+        {
+            using MemoryStream stream = MemoryStreamManager.Shared.GetStream();
+            using BinaryWriter writer = new(stream);
+
+            writer.Write((ulong)PlayerSelectResult.Failure);
 
             return stream.ToArray();
         }

src/Ryujinx.HLE/HOS/Kernel/Common/KSystemControl.cs

@@ -26,12 +26,12 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
             {
                 MemoryArrange.MemoryArrange4GiB or
                 MemoryArrange.MemoryArrange4GiBSystemDev or
-                MemoryArrange.MemoryArrange6GiBAppletDev => 3173 * MiB,
+                MemoryArrange.MemoryArrange6GiBAppletDev => 3236 * MiB,
                 MemoryArrange.MemoryArrange4GiBAppletDev => 2048 * MiB,
-                MemoryArrange.MemoryArrange6GiB => 4804 * MiB,
+                MemoryArrange.MemoryArrange6GiB => 4867 * MiB,
-                MemoryArrange.MemoryArrange8GiB => 6852 * MiB,
+                MemoryArrange.MemoryArrange8GiB => 6915 * MiB,
-                MemoryArrange.MemoryArrange10GiB => 8900 * MiB,
+                MemoryArrange.MemoryArrange10GiB => 8963 * MiB,
-                MemoryArrange.MemoryArrange12GiB => 10948 * MiB,
+                MemoryArrange.MemoryArrange12GiB => 11011 * MiB,
                 _ => throw new ArgumentException($"Invalid memory arrange \"{arrange}\"."),
             };
         }

src/Ryujinx.HLE/HOS/Kernel/Memory/KPageTableBase.cs

@@ -203,7 +203,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                     heapRegion.Size = memConfig switch {
                         MemoryConfiguration.MemoryConfiguration8GiB => 0x200000000u,
                         MemoryConfiguration.MemoryConfiguration10GiB when !isHeapLimited => 0x280000000u,
+                        MemoryConfiguration.MemoryConfiguration10GiB => 0x200000000u,
                         MemoryConfiguration.MemoryConfiguration12GiB when !isHeapLimited => 0x300000000u,
+                        MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
                         _ => 0x180000000u
                     };
                     stackRegion.Size = 0;
@@ -238,7 +240,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                         heapRegion.Size = memConfig switch {
                             MemoryConfiguration.MemoryConfiguration8GiB => 0x200000000u,
                             MemoryConfiguration.MemoryConfiguration10GiB when !isHeapLimited => 0x280000000u,
+                            MemoryConfiguration.MemoryConfiguration10GiB => 0x200000000u,
                             MemoryConfiguration.MemoryConfiguration12GiB when !isHeapLimited => 0x300000000u,
+                            MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
                             _ => 0x180000000u
                         };
                         stackRegion.Size = 1UL << (addressSpaceWidth - 8);
@@ -257,7 +261,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
                         heapRegion.Size = memConfig switch {
                             MemoryConfiguration.MemoryConfiguration8GiB => 0x200000000u,
                             MemoryConfiguration.MemoryConfiguration10GiB when !isHeapLimited => 0x280000000u,
+                            MemoryConfiguration.MemoryConfiguration10GiB => 0x200000000u,
                             MemoryConfiguration.MemoryConfiguration12GiB when !isHeapLimited => 0x300000000u,
+                            MemoryConfiguration.MemoryConfiguration12GiB => 0x200000000u,
                             _ => 0x180000000u
                         };
                         stackRegion.Size = 0x80000000;

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/ILibraryAppletCreator.cs

@@ -21,6 +21,21 @@ namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.Sys
             return ResultCode.Success;
         }
 
+        [CommandCmif(3)] // 20.0.0+
+        // CreateLibraryAppletEx(u32, u32, u64) -> object<nn::am::service::ILibraryAppletAccessor>
+        public ResultCode CreateLibraryAppletEx(ServiceCtx context)
+        {
+            AppletId appletId = (AppletId)context.RequestData.ReadInt32();
+
+            _ = context.RequestData.ReadInt32(); // libraryAppletMode
+
+            _ = context.RequestData.ReadUInt64(); // threadId
+
+            MakeObject(context, new ILibraryAppletAccessor(appletId, context.Device.System));
+
+            return ResultCode.Success;
+        }
+
         [CommandCmif(10)]
         // CreateStorage(u64) -> object<nn::am::service::IStorage>
         public ResultCode CreateStorage(ServiceCtx context)

src/Ryujinx.HLE/Loaders/Processes/ProcessLoader.cs

@@ -7,6 +7,7 @@ using LibHac.Tools.Fs;
 using LibHac.Tools.FsSystem;
 using LibHac.Tools.FsSystem.NcaUtils;
 using Ryujinx.Common.Logging;
+using Ryujinx.Graphics.Gpu;
 using Ryujinx.HLE.Loaders.Executables;
 using Ryujinx.HLE.Loaders.Processes.Extensions;
 using System.Collections.Concurrent;
@@ -23,7 +24,62 @@ namespace Ryujinx.HLE.Loaders.Processes
 
         private ulong _latestPid;
 
-        public ProcessResult ActiveApplication => _processesByPid[_latestPid];
+        private readonly object _pidLock = new();
+
+#nullable enable
+        public ProcessResult? ActiveApplication
+        {
+            get
+            {
+                lock (_pidLock)
+                {
+                    // Check if _latestPid is still valid
+                    if (_latestPid == 0)
+                    {
+                        return null;
+                    }
+
+                    // Verify process still exists in kernel (authoritative source)
+                    if (!_device.System.KernelContext.Processes.TryGetValue(_latestPid, out HOS.Kernel.Process.KProcess? kernelProcess))
+                    {
+                        // Process no longer exists in kernel, clear stale state
+                        Logger.Warning?.Print(LogClass.Loader,
+                            $"ActiveApplication PID {_latestPid} no longer exists in kernel, clearing stale state");
+
+                        _processesByPid.TryRemove(_latestPid, out _);
+                        _latestPid = 0;
+
+                        return null;
+                    }
+
+                    // Verify process still exists in ProcessLoader's dictionary
+                    if (_processesByPid.TryGetValue(_latestPid, out ProcessResult? processResult))
+                    {
+                        // Additional check: verify process state
+                        if (kernelProcess.State == HOS.Kernel.Process.ProcessState.Exited ||
+                            kernelProcess.State == HOS.Kernel.Process.ProcessState.Exiting)
+                        {
+                            Logger.Warning?.Print(LogClass.Loader,
+                                $"ActiveApplication PID {_latestPid} is in state {kernelProcess.State}, clearing");
+
+                            _processesByPid.TryRemove(_latestPid, out _);
+                            _latestPid = 0;
+
+                            return null;
+                        }
+
+                        return processResult;
+                    }
+
+                    // Fallback: clear stale PID if not in our dictionary
+                    Logger.Warning?.Print(LogClass.Loader,
+                        $"ActiveApplication PID {_latestPid} not in ProcessLoader dictionary, clearing");
+                    _latestPid = 0;
+                    return null;
+                }
+            }
+        }
+#nullable disable
 
         public ProcessLoader(Switch device)
         {
@@ -226,7 +282,7 @@ namespace Ryujinx.HLE.Loaders.Processes
             }
 
             // Explicitly null TitleId to disable the shader cache.
-            Graphics.Gpu.GraphicsConfig.TitleId = null;
+            GraphicsConfig.TitleId = null;
             _device.Gpu.HostInitalized.Set();
 
             ProcessResult processResult = ProcessLoaderHelper.LoadNsos(_device,
@@ -265,5 +321,37 @@ namespace Ryujinx.HLE.Loaders.Processes
 
             return false;
         }
+
+        /// <summary>
+        /// Clears a specific process from the ProcessLoader's tracking.
+        /// This should be called when a process exits or is terminated.
+        /// </summary>
+        /// <param name="pid">The process ID to clear</param>
+        public void ClearProcess(ulong pid)
+        {
+            lock (_pidLock)
+            {
+                if (_processesByPid.TryRemove(pid, out _))
+                {
+                    if (_latestPid == pid)
+                    {
+                        _latestPid = 0;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Clears all processes from the ProcessLoader's tracking.
+        /// This should be called during system shutdown.
+        /// </summary>
+        public void ClearAllProcesses()
+        {
+            lock (_pidLock)
+            {
+                _processesByPid.Clear();
+                _latestPid = 0;
+            }
+        }
     }
 }

src/Ryujinx.HLE/Ryujinx.HLE.csproj

@@ -59,6 +59,7 @@
     <EmbeddedResource Include="HOS\Applets\SoftwareKeyboard\Resources\Icon_BtnB.png" />
     <EmbeddedResource Include="HOS\Applets\SoftwareKeyboard\Resources\Icon_KeyF6.png" />
     <EmbeddedResource Include="HOS\Services\Account\Acc\DefaultUserImage.jpg" />
+    <EmbeddedResource Include="HOS\Services\Account\Acc\GuestUserImage.jpg" />
   </ItemGroup>
 
 </Project>

src/Ryujinx.HLE/Switch.cs

@@ -208,6 +208,7 @@ namespace Ryujinx.HLE
         {
             if (disposing)
             {
+                Processes.ClearAllProcesses();
                 System.Dispose();
                 AudioDeviceDriver.Dispose();
                 FileSystem.Dispose();

src/Ryujinx.HLE/UI/IHostUIHandler.cs

@@ -1,4 +1,5 @@
 using Ryujinx.HLE.HOS.Applets;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
 using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types;
 
 namespace Ryujinx.HLE.UI
@@ -48,7 +49,8 @@ namespace Ryujinx.HLE.UI
         /// Displays a Message Dialog box specific to Error Applet and blocks until it is closed.
         /// </summary>
         /// <returns>False when OK is pressed, True when another button (Details) is pressed.</returns>
-        bool DisplayErrorAppletDialog(string title, string message, string[] buttonsText);
+        // ReSharper disable once UnusedParameter.Global
+        bool DisplayErrorAppletDialog(string title, string message, string[] buttonsText, (uint Module, uint Description)? errorCode = null);
 
         /// <summary>
         /// Creates a handler to process keyboard inputs into text strings.
@@ -65,5 +67,10 @@ namespace Ryujinx.HLE.UI
         /// Takes a screenshot from the current renderer and saves it in the screenshots folder.
         /// </summary>
         void TakeScreenshot();
+
+        /// <summary>
+        /// Displays the player select dialog and returns the selected profile.
+        /// </summary>
+        UserProfile ShowPlayerSelectDialog();
     }
 }

src/Ryujinx/Headless/WindowBase.cs

@@ -10,6 +10,7 @@ using Ryujinx.Graphics.GAL.Multithreading;
 using Ryujinx.Graphics.Gpu;
 using Ryujinx.Graphics.OpenGL;
 using Ryujinx.HLE.HOS.Applets;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
 using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types;
 using Ryujinx.HLE.Loaders.Processes;
 using Ryujinx.HLE.UI;
@@ -28,6 +29,7 @@ using static SDL.SDL3;
 using AntiAliasing = Ryujinx.Common.Configuration.AntiAliasing;
 using ScalingFilter = Ryujinx.Common.Configuration.ScalingFilter;
 using Switch = Ryujinx.HLE.Switch;
+using UserProfile = Ryujinx.HLE.HOS.Services.Account.Acc.UserProfile;
 
 namespace Ryujinx.Headless
 {
@@ -531,7 +533,7 @@ namespace Ryujinx.Headless
             Exit();
         }
 
-        public bool DisplayErrorAppletDialog(string title, string message, string[] buttonsText)
+        public bool DisplayErrorAppletDialog(string title, string message, string[] buttonsText, (uint Module, uint Description)? errorCode = null)
         {
             SDL_MessageBoxButtonData[] buttons = new SDL_MessageBoxButtonData[buttonsText.Length];
 
@@ -590,5 +592,10 @@ namespace Ryujinx.Headless
         {
             throw new NotImplementedException();
         }
+        
+        public UserProfile ShowPlayerSelectDialog()
+        {
+            return AccountSaveDataManager.GetLastUsedUser();
+        }
     }
 }

src/Ryujinx/Ryujinx.csproj

@@ -169,4 +169,10 @@
   <ItemGroup>
     <TrimmerRootDescriptor Include="TrimmerRootDescriptor.xml" />
   </ItemGroup>
+  <ItemGroup>
+    <Compile Update="UI\Applet\UserSelectorDialog.axaml.cs">
+      <DependentUpon>UserSelectorDialog.axaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
 </Project>

src/Ryujinx/UI/Applet/AvaHostUIHandler.cs

@@ -1,17 +1,23 @@
 using Avalonia.Controls;
 using Avalonia.Threading;
 using FluentAvalonia.UI.Controls;
+using Gommon;
 using Ryujinx.Ava.Common.Locale;
 using Ryujinx.Ava.UI.Controls;
 using Ryujinx.Ava.UI.Helpers;
+using Ryujinx.Ava.UI.ViewModels;
 using Ryujinx.Ava.UI.Windows;
+using Ryujinx.Common;
 using Ryujinx.HLE;
 using Ryujinx.HLE.HOS.Applets;
 using Ryujinx.HLE.HOS.Applets.SoftwareKeyboard;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
 using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types;
 using Ryujinx.HLE.UI;
 using Ryujinx.UI.Common.Configuration;
 using System;
+using System.Collections.ObjectModel;
+using System.Linq;
 using System.Threading;
 
 namespace Ryujinx.Ava.UI.Applet
@@ -215,7 +221,7 @@ namespace Ryujinx.Ava.UI.Applet
             _parent.ViewModel.AppHost?.Stop();
         }
 
-        public bool DisplayErrorAppletDialog(string title, string message, string[] buttons)
+        public bool DisplayErrorAppletDialog(string title, string message, string[] buttons, (uint Module, uint Description)? errorCode = null)
         {
             ManualResetEvent dialogCloseEvent = new(false);
 
@@ -256,9 +262,59 @@ namespace Ryujinx.Ava.UI.Applet
             return showDetails;
         }
 
-        public IDynamicTextInputHandler CreateDynamicTextInputHandler()
+        public IDynamicTextInputHandler CreateDynamicTextInputHandler() => new AvaloniaDynamicTextInputHandler(_parent);
+        
+        public UserProfile ShowPlayerSelectDialog()
         {
-            return new AvaloniaDynamicTextInputHandler(_parent);
+            UserId selected = UserId.Null;
+            byte[] defaultGuestImage = EmbeddedResources.Read("Ryujinx.HLE/HOS/Services/Account/Acc/GuestUserImage.jpg");
+            UserProfile guest = new UserProfile(new UserId("00000000000000000000000000000080"), "Guest", defaultGuestImage);
+    
+            ManualResetEvent dialogCloseEvent = new(false);
+    
+            Dispatcher.UIThread.InvokeAsync(async () =>
+            {
+                ObservableCollection<BaseModel> profiles = [];
+                NavigationDialogHost nav = new();
+                
+                _parent.AccountManager.GetAllUsers()
+                    .OrderBy(x => x.Name)
+                    .ForEach(profile => profiles.Add(new Models.UserProfile(profile, nav)));
+                
+                profiles.Add(new Models.UserProfile(guest, nav));
+                ProfileSelectorDialogViewModel viewModel = new()
+                {
+                    Profiles = profiles,
+                    SelectedUserId = _parent.AccountManager.LastOpenedUser.UserId
+                };
+                (selected, _) = await ProfileSelectorDialog.ShowInputDialog(viewModel);
+        
+                dialogCloseEvent.Set();
+            });
+    
+            dialogCloseEvent.WaitOne();
+            
+            UserProfile profile = _parent.AccountManager.LastOpenedUser;
+            if (selected == guest.UserId)
+            {
+                profile = guest;
+            }
+            else if (selected == UserId.Null)
+            {
+                profile = null;
+            }
+            else
+            {
+                foreach (UserProfile p in _parent.AccountManager.GetAllUsers())
+                {
+                    if (p.UserId == selected)
+                    {
+                        profile = p;
+                        break;
+                    }
+                }
+            }
+            return profile;
         }
 
         public void TakeScreenshot()

src/Ryujinx/UI/Applet/ProfileSelectorDialog.axaml

@@ -0,0 +1,121 @@
+<UserControl
+    x:Class="Ryujinx.Ava.UI.Applet.ProfileSelectorDialog"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:helpers="clr-namespace:Ryujinx.Ava.UI.Helpers"
+    xmlns:models="clr-namespace:Ryujinx.Ava.UI.Models"
+    xmlns:viewModels="clr-namespace:Ryujinx.Ava.UI.ViewModels"
+    d:DesignHeight="450"
+    MinWidth="500"
+    d:DesignWidth="800"
+    mc:Ignorable="d"
+    Focusable="True"
+    x:DataType="viewModels:ProfileSelectorDialogViewModel">
+    
+    <UserControl.Resources>
+        <helpers:BitmapArrayValueConverter x:Key="ByteImage" />
+    </UserControl.Resources>
+    
+    <Design.DataContext>
+        <viewModels:ProfileSelectorDialogViewModel />
+    </Design.DataContext>
+    
+    <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
+        <Grid.RowDefinitions>
+            <RowDefinition />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+        
+        <Border
+            CornerRadius="5"
+            BorderBrush="{DynamicResource AppListHoverBackgroundColor}"
+            BorderThickness="1">
+            
+            <ListBox
+                MaxHeight="300"
+                HorizontalAlignment="Stretch"
+                VerticalAlignment="Center"
+                Background="Transparent"
+                ItemsSource="{Binding Profiles}"
+                SelectionChanged="ProfilesList_SelectionChanged">
+                
+                <ListBox.ItemsPanel>
+                    <ItemsPanelTemplate>
+                        <WrapPanel
+                            HorizontalAlignment="Left"
+                            VerticalAlignment="Center"
+                            Orientation="Horizontal" />
+                    </ItemsPanelTemplate>
+                </ListBox.ItemsPanel>
+                
+                <ListBox.Styles>
+                    <Style Selector="ListBoxItem">
+                        <Setter Property="Margin" Value="5 5 0 5" />
+                        <Setter Property="CornerRadius" Value="5" />
+                    </Style>
+                    <Style Selector="Rectangle#SelectionIndicator">
+                        <Setter Property="Opacity" Value="0" />
+                    </Style>
+                </ListBox.Styles>
+                
+                <ListBox.DataTemplates>
+                    <DataTemplate
+                        DataType="models:UserProfile">
+                        <Grid
+                            PointerEntered="Grid_PointerEntered"
+                            PointerExited="Grid_OnPointerExited">
+                            <Border
+                                HorizontalAlignment="Stretch"
+                                VerticalAlignment="Stretch"
+                                ClipToBounds="True"
+                                CornerRadius="5"
+                                Background="{Binding BackgroundColor}">
+                                <StackPanel
+                                    HorizontalAlignment="Stretch"
+                                    VerticalAlignment="Stretch">
+                                    <Image
+                                        Width="96"
+                                        Height="96"
+                                        HorizontalAlignment="Stretch"
+                                        VerticalAlignment="Top"
+                                        Source="{Binding Image, Converter={StaticResource ByteImage}}" />
+                                    <TextBlock
+                                        HorizontalAlignment="Stretch"
+                                        MaxWidth="90"
+                                        Text="{Binding Name}"
+                                        TextAlignment="Center"
+                                        TextWrapping="Wrap"
+                                        TextTrimming="CharacterEllipsis"
+                                        MaxLines="2"
+                                        Margin="5" />
+                                </StackPanel>
+                            </Border>
+                        </Grid>
+                    </DataTemplate>
+                    <DataTemplate
+                        DataType="viewModels:BaseModel">
+                        <Panel
+                            Height="118"
+                            Width="96">
+                            <Panel.Styles>
+                                <Style Selector="Panel">
+                                    <Setter Property="Background" Value="{DynamicResource ListBoxBackground}" />
+                                </Style>
+                            </Panel.Styles>
+                        </Panel>
+                    </DataTemplate>
+                </ListBox.DataTemplates>
+            </ListBox>
+        </Border>
+        
+        <StackPanel
+            Grid.Row="1"
+            Margin="0 24 0 0"
+            HorizontalAlignment="Left"
+            Orientation="Horizontal"
+            Spacing="10">
+        </StackPanel>
+    </Grid>
+</UserControl>

src/Ryujinx/UI/Applet/ProfileSelectorDialog.axaml.cs

@@ -0,0 +1,125 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Input;
+using FluentAvalonia.UI.Controls;
+using Ryujinx.Ava.Common.Locale;
+using Ryujinx.Ava.UI.Controls;
+using Ryujinx.Ava.UI.Helpers;
+using Ryujinx.Ava.UI.ViewModels;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
+using Ryujinx.UI.Common.Configuration;
+using System.Collections.ObjectModel;
+using System.Threading.Tasks;
+using UserProfile = Ryujinx.Ava.UI.Models.UserProfile;
+using UserProfileSft = Ryujinx.HLE.HOS.Services.Account.Acc.UserProfile;
+
+namespace Ryujinx.Ava.UI.Applet
+{
+    public partial class ProfileSelectorDialog : UserControl
+    {
+        public ProfileSelectorDialogViewModel ViewModel { get; set; }
+
+        public ProfileSelectorDialog(ProfileSelectorDialogViewModel viewModel)
+        {
+            DataContext = ViewModel = viewModel;
+            
+            InitializeComponent();
+        }
+        
+        private void Grid_PointerEntered(object sender, PointerEventArgs e)
+        {
+            if (sender is Grid { DataContext: UserProfile profile })
+            {
+                profile.IsPointerOver = true;
+            }
+        }
+
+        private void Grid_OnPointerExited(object sender, PointerEventArgs e)
+        {
+            if (sender is Grid { DataContext: UserProfile profile })
+            {
+                profile.IsPointerOver = false;
+            }
+        }
+
+        private void ProfilesList_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (sender is ListBox listBox)
+            {
+                int selectedIndex = listBox.SelectedIndex;
+
+                if (selectedIndex >= 0 && selectedIndex < ViewModel.Profiles.Count)
+                {
+                    if (ViewModel.Profiles[selectedIndex] is UserProfile userProfile)
+                    {
+                        ViewModel.SelectedUserId = userProfile.UserId;
+                        Logger.Info?.Print(LogClass.UI, $"Selected: {userProfile.UserId}", "ProfileSelector");
+
+                        ObservableCollection<BaseModel> newProfiles = [];
+
+                        foreach (BaseModel item in ViewModel.Profiles)
+                        {
+                            if (item is UserProfile originalItem)
+                            {
+                                UserProfileSft profile = new(originalItem.UserId, originalItem.Name, originalItem.Image);
+                                
+                                if (profile.UserId == ViewModel.SelectedUserId)
+                                {
+                                    profile.AccountState = AccountState.Open;
+                                }
+
+                                newProfiles.Add(new UserProfile(profile, new NavigationDialogHost()));
+                            }
+                        }
+
+                        ViewModel.Profiles = newProfiles;
+                    }
+                }
+            }
+        }
+
+        public static async Task<(UserId Id, bool Result)> ShowInputDialog(ProfileSelectorDialogViewModel viewModel)
+        {
+
+            if (ConfigurationState.Instance.System.SkipUserProfilesManager)
+            {
+                UserId defaultId = viewModel.SelectedUserId;
+                return (defaultId, true);
+            }
+
+            FAContentDialog contentDialog = new()
+            {
+                Title = LocaleManager.Instance[LocaleKeys.UserProfileWindowTitle],
+                PrimaryButtonText = LocaleManager.Instance[LocaleKeys.Continue],
+                SecondaryButtonText = string.Empty,
+                CloseButtonText = LocaleManager.Instance[LocaleKeys.Cancel],
+                Content = new ProfileSelectorDialog(viewModel),
+                Padding = new Thickness(0)
+            };
+
+            UserId result = UserId.Null;
+            bool input = false;
+            
+            contentDialog.Closed += Handler;
+
+            await ContentDialogHelper.ShowAsync(contentDialog);
+
+            return (result, input);
+            
+            void Handler(FAContentDialog sender, FAContentDialogClosedEventArgs eventArgs)
+            {
+                if (eventArgs.Result == FAContentDialogResult.Primary)
+                {
+                    result = viewModel.SelectedUserId;
+                    input = true;
+                }
+                else
+                {
+                    result = UserId.Null;
+                    input = false;
+                }
+            }
+        }
+    }
+}

src/Ryujinx/UI/ViewModels/ProfileSelectorDialogViewModel.cs

@@ -0,0 +1,14 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
+using System.Collections.ObjectModel;
+
+namespace Ryujinx.Ava.UI.ViewModels
+{
+    public partial class ProfileSelectorDialogViewModel : BaseModel
+    {
+
+        [ObservableProperty] private UserId _selectedUserId;
+
+        [ObservableProperty] private ObservableCollection<BaseModel> _profiles = [];
+    }
+}