Whitescreen - application lauched terminally

[eo5e]

Is there an existing issue for this?

• I have searched both open/closed issues, no issue already exists.

CefSharp Version

109.1.110

Operating System

Windows Server 2016

Architecture

x64

.Net Version

.NET 4.8

Implementation

WinForms

Reproduction Steps

MinimalExample work locally - on a server but it doesn't work terminally
Result:

Log from debug.log:

[0822/182215.481:ERROR:crashpad_client_win.cc(534)] CreateProcess: Nie można odnaleźć określonego pliku. (0x2)
[0822/182215.485:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/182215.505:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/182215.770:WARNING:dxgi_swap_chain_image_backing.cc(205)] First draw to surface should draw to everything
[0822/182215.952:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/182216.009:INFO:CONSOLE(81)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (81)
[0822/182221.984:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/182221.984:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192622.964:ERROR:crashpad_client_win.cc(534)] CreateProcess: The system cannot find the file specified. (0x2)
[0822/192622.979:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/192622.995:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/192624.664:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/192624.781:INFO:CONSOLE(81)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (81)
[0822/192630.205:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192630.205:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192630.799:ERROR:crashpad_client_win.cc(534)] CreateProcess: The system cannot find the file specified. (0x2)
[0822/192630.799:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/192630.815:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/192631.304:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/192631.731:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Unrecognized feature: 'ch-ua-form-factor'.", source:  (0)
[0822/192632.251:WARNING:frame_impl.cc(420)] SendProcessMessage sent to detached frame 25769803781 [6,5] will be ignored
[0822/192632.267:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192632.267:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192633.501:ERROR:crashpad_client_win.cc(534)] CreateProcess: The system cannot find the file specified. (0x2)
[0822/192633.501:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/192633.517:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/192633.966:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/192634.718:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192634.718:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/192657.210:ERROR:crashpad_client_win.cc(534)] CreateProcess: The system cannot find the file specified. (0x2)
[0822/192657.225:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/192657.241:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/192658.740:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193043.054:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193107.397:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193125.957:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193127.845:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193132.120:WARNING:frame_impl.cc(420)] SendProcessMessage sent to detached frame 25769803780 [6,4] will be ignored
[0822/193132.221:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/193132.221:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/193154.964:ERROR:crashpad_client_win.cc(534)] CreateProcess: The system cannot find the file specified. (0x2)
[0822/193154.964:INFO:crash_reporting.cc(216)] Crash reporting enabled for process: browser
[0822/193154.995:WARNING:chrome_browser_cloud_management_controller.cc(88)] Could not create policy manager as CBCM is not enabled.
[0822/193155.871:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/193207.568:WARNING:frame_impl.cc(420)] SendProcessMessage sent to detached frame 25769803780 [6,4] will be ignored
[0822/193207.600:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.
[0822/193207.600:WARNING:sqlite_persistent_store_backend_base.cc(194)] Failed to post task from FlushAndNotifyInBackground@net\extras\sqlite\sqlite_persistent_store_backend_base.cc:242 to client_task_runner_.

My actual code:

public static class CefRuntime
    {
        public static string AppPath()
        {
            var appPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
            return appPath;
        }

        public static void Load()
        {
            var appPath = AppPath();
            if (!File.Exists(Path.Combine(appPath, "libcef.dll")))
            {
                var libPath = Path.Combine(appPath, Environment.Is64BitProcess ? "x64" : "x86");
                CopyFiles(new DirectoryInfo(libPath), new DirectoryInfo(appPath));
            }
            if (Environment.UserInteractive)
                AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolver;
        }

        private static void CopyFiles(DirectoryInfo source, DirectoryInfo target)
        {
            foreach (var dir in source.GetDirectories())
                CopyFiles(dir, target.CreateSubdirectory(dir.Name));
            foreach (var file in source.GetFiles())
                file.CopyTo(Path.Combine(target.FullName, file.Name), true);
        }

        private static Assembly AssemblyResolver(object sender, ResolveEventArgs args)
        {
            if (args.Name.StartsWith("CefSharp"))
            {
                string assemblyName = args.Name.Split(new[] { ',' }, 2)[0] + ".dll";
                string archSpecificPath = Path.Combine(AppDomain.CurrentDomain.SetupInformation.ApplicationBase, Environment.Is64BitProcess ? "x64" : "x86", assemblyName);
                return File.Exists(archSpecificPath) ? Assembly.LoadFile(archSpecificPath) : null;
            }
            return null;
        }

private static void Main(string[] args)
{
     CefRuntime.Load();
     Application.EnableVisualStyles();
     Application.SetCompatibleTextRenderingDefault(false);

     if (!Cef.IsInitialized)
                {
                    var appPath = CefRuntime.AppPath();
                    var settings = new CefSettings
                    {
                        LogSeverity = LogSeverity.Disable,
                        LocalesDirPath = Path.Combine(appPath, "locales"),
                        ResourcesDirPath = appPath,
                        Locale = CultureInfo.CurrentUICulture.Parent.Name,
                        BrowserSubprocessPath = Path.Combine(appPath, "CefSharp.BrowserSubprocess.exe"),
                    };
                    settings.CefCommandLineArgs.Add("disable-gpu");
                    Cef.Initialize(settings, true);
                }
}

Expected behavior

Launch, for example, the website "google.com"

Actual behavior

When I run the application on the server - everything works.
When I run the application in terminal (the application runs on the server and I only get the program image) - nothing shows up when the page loads.

• I can view the page source.
• I can click on links (but can't see them)
• Tool "devTools" - opens a window - but is empty

Regression?

Previous build from packages.config

<package id="cef.redist.x64" version="3.3497.1841" targetFramework="net462" />
<package id="cef.redist.x86" version="3.3497.1841" targetFramework="net462" />
<package id="CefSharp.Common" version="69.0.0" targetFramework="net462" />
<package id="CefSharp.WinForms" version="69.0.0" targetFramework="net462" />

This version works fine.

Known Workarounds

No response

Does this problem also occur in the CEF Sample Application

Yes using WinForms command line args

Other information

CEF Sample Application(cefclient) also doesn't work properly through the terminal (but it works localy on server)

Result:

Log from file debug.log:

[0822/183658.177:WARNING:chrome_browser_cloud_management_controller.cc(87)] Could not create policy manager as CBCM is not enabled.
[0822/183658.286:INFO:component_installer.cc(297)] Failed to verify installation for Widevine Content Decryption Module (C:\Users\user\AppData\Local\CEF\User Data\WidevineCdm\4.10.2662.3).: The system cannot find the path specified. (0x3)
[0822/183658.544:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/183658.789:ERROR:command_buffer_proxy_impl.cc(128)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
[0822/183658.791:ERROR:command_buffer_proxy_impl.cc(128)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
[0822/183658.938:INFO:CONSOLE(81)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (81)
[0822/183702.472:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/183915.688:WARNING:chrome_browser_cloud_management_controller.cc(87)] Could not create policy manager as CBCM is not enabled.
[0822/183916.082:ERROR:command_buffer_proxy_impl.cc(128)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
[0822/183916.313:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/183916.417:INFO:CONSOLE(81)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (81)
[0822/184206.645:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/184206.708:INFO:CONSOLE(139)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (139)
[0822/184207.778:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/184209.666:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/184214.602:INFO:CONSOLE(0)] "ResizeObserver loop completed with undelivered notifications.", source: https://twitter.com/ (0)
[0822/184214.958:WARNING:obfuscated_file_util.cc(1402)] Failed to get origin+type directory: { uri: filesystem:https://twitter.com/temporary/, storage key: { origin: https://twitter.com, top-level site: https://twitter.com, nonce: <null>, ancestor chain bit: Same-Site }, bucket id: 1 } error:-4
[0822/184223.586:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.", source:  (0)
[0822/184223.977:INFO:CONSOLE(0)] "
%cStop! font-family:helvetica; font-size:20px; font-size:50px; font-weight:bold; color:red; -webkit-text-stroke:1px black;", source:  (0)
[0822/184223.977:INFO:CONSOLE(0)] "
%cThis is a browser feature intended for developers. If someone told you to copy-paste something here to enable a Facebook feature or "hack" someone's account, it is a scam and will give them access to your Facebook account. font-family:helvetica; font-size:20px; ", source:  (0)
[0822/184223.977:INFO:CONSOLE(0)] "
%cSee https://www.facebook.com/selfxss for more information. font-family:helvetica; font-size:20px; ", source:  (0)
[0822/184223.978:INFO:CONSOLE(0)] "
%c ", source:  (0)
[0822/184244.684:WARNING:webrtc_voice_engine.cc(641)] Attempting to stop aecdump when no audio processing module is present
[0822/184601.014:WARNING:chrome_browser_cloud_management_controller.cc(87)] Could not create policy manager as CBCM is not enabled.
[0822/184601.820:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/191350.033:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/191350.042:INFO:CONSOLE(1)] "The Cross-Origin-Opener-Policy header has been ignored, because the URL's origin was untrustworthy. It was defined either in the final response or a redirect. Please deliver the response using the HTTPS protocol. You can also use the 'localhost' origin instead. See https://www.w3.org/TR/powerful-features/#potentially-trustworthy-origin and https://html.spec.whatwg.org/#the-cross-origin-opener-policy-header.", source: https://www.google.com/ (1)
[0822/191435.542:WARNING:frame_impl.cc(420)] SendProcessMessage sent to detached frame 55834574852 [13,4] will be ignored
[0822/191444.407:WARNING:chrome_browser_cloud_management_controller.cc(87)] Could not create policy manager as CBCM is not enabled.
[0822/191445.196:INFO:CONSOLE(0)] "Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'unload'.", source:  (0)
[0822/191445.287:INFO:CONSOLE(81)] "Autofocus processing was blocked because a document already has a focused element.", source: https://www.google.com/ (81)

[amaitland]

Converted to discussion as this is not a bug in CefSharp.

What version are you using? Please only open an issue if you can reproduce the problem with version 114.2.120 or later.

As per the bug report template, please don't create issues for old unsupported versions.

If you can reproduce the problem with cefclient then please report the issue on CEF Issue Tracker (Make sure you search before opening an issue). If you open an issue here it will most likely be closed as upstream as the bug needs to be fixed in CEF.

As cefclient doesn't work this isn't a CefSharp bug. CEF has it's own issue tracker and support forum. Try searching the forum to see if others have reported similar issues.

You need to workout the reason cefclient is failing to load, then go from there.

Does Chrome even work when run through Terminal Services on your server? If it does then load chrome://gpu to see what GPU components.

[0822/183658.789:ERROR:command_buffer_proxy_impl.cc(128)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.

cefclient log shows there are GPU errors in the log, hence the white screen. disable-gpu only disables the acceleration.

[eo5e]

Finally works. My settings:

settings.DisableGpuAcceleration();
settings.CefCommandLineArgs.Add("renderer-process-limit=2");
settings.CefCommandLineArgs.Add("in-process-gpu");

[amaitland]

settings.DisableGpuAcceleration();

This simply adds the disable-gpu command line arg.

settings.CefCommandLineArgs.Add("renderer-process-limit=2");

Changing the render process limit will often lead to unexpected behaviour, this is not something I recommend or support.

I'm surprised it's required to make your application work in terminal services.

settings.CefCommandLineArgs.Add("in-process-gpu");

Any GPU crash will crash your main application using this arg. Last I checked this was only used by default in Android and for debugging purposes. On Windows the default is to use a separate process.

Use at your own risk.