Unable To Run CEF4Delphi with Delphi_FMX_Linux/FMXExternalPumpBrowser2

[Stefan1286b]

Hi.
I've been trying to compile and start Delphi_FMX_Linux/FMXExternalPumpBrowser2 for hours now. Without success.
I use Delphi 11.1 Architect with FMXLinux 1.69
Start it with PAServer on Ubuntu 18.04 LTS with all Updates.
I can start every other FMXLinux Application.

[Stefan1286b]

In the middle of the Linux Console you see an error. This is because I copied CEF with user root and not changed the permissions.

[salvadordf]

The FMX initialization in Delphi 11 seems to have changed. I'll have to ask for some favors to test this because I only have a Delphi Pro license.

[Stefan1286b]

I've tested it now with Delphi 10.4. But it is the same problem.
FMXLinux 1.65

[Stefan1286b]

can it be some other error since it doesn't work with Delphi 10.4 either?

[salvadordf]

I'll try to implement the Linux work scheduler in a similar way than the CEF sample application to see if that's a requirement now.

The Lazarus demo with an external pump is also having initialization problems with the last CEF binaries. I'll try to fix that first and then I'll ask for favors to test the Delphi solution because I only have a Delphi Pro license.

Sorry if this is taking too long.

[salvadordf]

After implementing the new Linux work scheduler I still get the same issue with all browsers using an external message pump in Linux.

The previous CEF4Delphi release which included Chromium 101 didn't have this issue. Please keep using the previous release.

I'll check again all code changes in CEF 102.

[salvadordf]

I'm getting this error on the terminal when I try to run some (all?) Linux demos built with Lazarus with GlobalCEFApp.MultiThreadedMessageLoop set to false.
Gtk-ERROR **: 15:27:45.937: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported «trap» para punto de parada/seguimiento (core' generado)`

[salvadordf]

The CEF project maintainer said that GTK3 is enabled by default. GTK3 is required by the Chrome runtime. Client applications using GTK2 will now require a custom build of CEF with use_gtk=false set via GN_DEFINES.
https://bitbucket.org/chromiumembedded/cef/issues/2969/support-chrome-windows-with-cef-callbacks#comment-60072383

The update to CEF 102 included this :
https://bitbucket.org/chromiumembedded/cef/branch/5005?dest=4951#Llibcef/browser/alloy/alloy_browser_main.ccT106

It seems that it's necessary to use only GTK3 when GlobalCEFApp.MultiThreadedMessageLoop is false.
CEF4Delphi still uses GTK2 in several units and that needs to be changed.

[salvadordf]

The latest update includes some Lazarus demos using GTK3.
They use GlobalCEFApp.MultiThreadedMessageLoop := false and they work correctly.
The new OSRExternalPumpBrowser demo for GTK3 is similar to FMXExternalPumpBrowser2 but the FMX demo is not fixed yet.

[salvadordf]

The latest update fixes this issue but it's also necessary to modify the FMX.Platform.Linux.pas unit in FMXLinux in order to avoid an access violation.
https://bitbucket.org/crossvcl/fmxlinux/issues/254/cef-initialization-with-fmxlinux

Please, download the latest CEF4Delphi version and test this on your computer.

[maxi-hard]

The issue persists on a latest CEF4Delphi version and latest FmxLinux 1.78...

The problem with initialization inside module "Fmx.Platform.Linux.initialization" still persists, could you please tell, is there any way to avoid it?

I am building an application on machine with Windows 11 64 bit. Deploying it to Linux 64bit machine.
Using Embarcadero RAD Studio 10.4 with fmxLinux 1.78 (latest at current).
Trying to build a demo program FMXExternalPumpBrowser2. All steps by your instruction.

And when trying to run application on remote Linux host, the error "Segmentation fault 11" is shown before anything is initialized.
An error occures while automatic initialization of module "Fmx.Platform.Linux.Initialization" (look screenshot) in standart initialization procedure "System.InitUnits".
Calls to "InitializeGlobalCEFApp" and "InitializeGTK" are not invoked.
Is there any way to fix it only by local changes?

I've read that developer of fmxLinux had died a couple months ago, unfortunately:
https://blogs.embarcadero.com/eugene-kryukov-father-of-firemonkey-and-incredibly-talented-developer/
So I am very afraid that updates of this extension will not be fast...

Thanks for any help.
Big thanks!

(2025-02-06, copypaste from briskbard forum)