[Qtwebengine] qt 5.5.0 beta

[Andras Becsi]

Hi Tom,

QtWebEngine does not support embedded setups with X11 out-of-the-box, so 
yes, your config can possibly work if you enable use_x11 in the config 
pri, but it is not guaranteed to be functional, since the only supported 
reference platform is the one provided by the Qt Enterprise Embedded / 
Boot2Qt stack, which uses the eglfs platform plugin.

This means you'll probably have to dig into the configuration and try 
out things yourself, but since your setup is basically equivalent with a 
desktop setup, you could also try using the desktop_linux.pri 
configuration. For this you'll probably have to tweak gyp_run.pro a bit.

/Andras

On 06/15/2015 10:42 AM, Tom Deblauwe wrote:
> Hello,
>
> I am trying out Qt 5.5.0-beta with webengine on buildroot. I am using
> X11, with the xcb platform plugin. I can succesfully start regular Qt
> apps, but when I want to use webengine in QML, then I have a crash when
> the webengine qml component initializes. It crashes in a call surrounded
> by an "USE_OZONE" ifdef:
>
>     ui::OzonePlatform::GetInstance()
>         ->GetGpuPlatformSupport()
>         ->OnChannelEstablished(this);
>
> Is ozone always needed? I saw in the "embedded_linux.pri" that there is
> also a "use_x11=0" entry. Would it work if I would set that to
> "use_x11=1" and leave the rest as-is?
>
> This is the backtrace I get:
>
> 0    content::GpuChildThread::OnInitialize    gpu_child_thread.cc 180
> 0xae3c2b4a
> 1    IPC::Message::Dispatch<content::GpuChildThread,
> content::GpuChildThread, void>    ipc_message.h    152 0xae3c3e77
> 2    content::GpuChildThread::OnControlMessageReceived
> gpu_child_thread.cc    114    0xae3c2394
> 3    content::ChildThread::OnMessageReceived    child_thread.cc 500
> 0xb026b2b9
> 4    IPC::ChannelProxy::Context::OnDispatchMessage
> ipc_channel_proxy.cc    274    0xb1ff09b9
> 5    base::internal::RunnableAdapter<void
> (IPC::ChannelProxy::Context::*)(IPC::Message const&)>::Run
> bind_internal.h    190    0xb1ff38bd
> 6    base::internal::InvokeHelper<false, void,
> base::internal::RunnableAdapter<void
> (IPC::ChannelProxy::Context::*)(IPC::Message const&)>, void
> (IPC::ChannelProxy::Context* const&, IPC::Message
> const&)>::MakeItSo(base::internal::RunnableAdapter<void
> (IPC::ChannelProxy::Context::*)(IPC::Message const&)>,
> IPC::ChannelProxy::Context* const&, IPC::Message const&)
> bind_internal.h    898    0xb1ff3588
> 7    base::internal::Invoker<2,
> base::internal::BindState<base::internal::RunnableAdapter<void
> (IPC::ChannelProxy::Context::*)(IPC::Message const&)>, void
> (IPC::ChannelProxy::Context*, IPC::Message const&), void
> (IPC::ChannelProxy::Context*, IPC::Message)>, void
> (IPC::ChannelProxy::Context*, IPC::Message
> const&)>::Run(base::internal::BindStateBase*) bind_internal.h    1253
> 0xb1ff30e2
> 8    base::Callback<void ()>::Run() const    callback.h 401    0xae2c4af3
> 9    base::debug::TaskAnnotator::RunTask    task_annotator.cc 63
> 0xb1f0a6a1
> 10    base::MessageLoop::RunTask    message_loop.cc    447 0xb1f65ecd
> 11    base::MessageLoop::DeferOrRunPendingTask    message_loop.cc 456
> 0xb1f65f9e
> 12    base::MessageLoop::DoWork    message_loop.cc    565 0xb1f664e1
> 13    base::MessagePumpDefault::Run    message_pump_default.cc 32
> 0xb1f6c438
> 14    base::MessageLoop::RunHandler    message_loop.cc    415 0xb1f65bb9
> 15    base::RunLoop::Run    run_loop.cc    55    0xb1f97aa5
> 16    base::MessageLoop::Run    message_loop.cc    308 0xb1f6524b
> 17    base::Thread::Run    thread.cc    174    0xb1fcae71
> 18    base::Thread::ThreadMain    thread.cc    228    0xb1fcb122
> 19    base::(anonymous namespace)::ThreadFunc
> platform_thread_posix.cc    80    0xb1fc0729
> 20    start_thread    pthread_create.c    310    0xb587211f
> ...    <More>
>
> Best regards,
> Tom,
>
> _______________________________________________
> QtWebEngine mailing list
> QtWebEngine at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/qtwebengine
>


-- 
Best regards,
András Bécsi
Software Engineer | The Qt Company

The Qt Company AS
Sandakerveien 116
0484 Oslo, Norway

Mailing address:
PO Box 23 Nydalen
0410 Oslo, Norway

Visit us on: http://www.qt.io