Only black screen now

[ensonic]

I am now just getting a black window on linux, I am not sure where the messages come from, they are not in the pandomium sources. Any idea?

[17:18:15.903][AWT-EventQueue-1/INFO ] Initialize on Thread[AWT-EventQueue-1,6,main] with library path /home/ensonic/projects/lego/gsoc/pandomium-example/native
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
LaunchProcess: failed to execvp:
/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper
[0609/171816.867395:ERROR:browser_gpu_channel_host_factory.cc(103)] Failed to launch GPU process.

[dzikoysk]

Honestly, I don't know. It looks like jcef/cef bug on Linux. Failed to launch GPU process is the result of LaunchProcess: failed to execvp. I can't find anything useful, releated to this case:

• jcef_helper.cpp
• ceforum

Could you try to launch cefpython? I'm asking, because: firstly, we don't know that it is a cef, older cef or jcef problem, and secondly, maybe it's time to focus on CefStream.
I'm aware of the inconvenience of JCEF project. Integration with much more popular project like cefpython could be really helpful.

[ensonic]

Did you made a change to write a log file?

When I strace the invocation, I get:

133708 execve("/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper", ["/home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper", "--type=gpu-process", "--no-sandbox", "--lang=en-US", "--locales-dir-path=/home/ensonic/projects/lego/gsoc/pandomium-example/native/locales", "--log-file=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/debug.log", "--resources-dir-path=/home/ensonic/projects/lego/gsoc/pandomium-example/native", "--use-gl=swiftshader-webgl", "--supports-dual-gpus=false", "--gpu-driver-bug-workarounds=1,7,16,24,63,76", "--disable-gl-extensions=GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent", "--disable-webrtc-hw-encoding", "--gpu-vendor-id=0x8086", "--gpu-device-id=0x0166", "--gpu-driver-vendor=Google Inc.", "--gpu-driver-version=3.3.0.2", "--gpu-driver-date=2017/04/07", "--lang=en-US", "--locales-dir-path=/home/ensonic/projects/lego/gsoc/pandomium-example/native/locales", "--log-file=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/debug.log", "--resources-dir-path=/home/ensonic/projects/lego/gsoc/pandomium-example/native", "--service-request-channel-token=E0D239198F3EA0AC690C3746E2F581DA"], 0x7f3f0437a940 /* 71 vars */) = -1 EACCES (Permission denied)

Main issue seems to be "--log-file=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/debug.log" and thats hard to workaround. This is still the issues, that chrome sees to switch the cwd to the one from java :/ (see problems in #11 (comment))

It seems that the setting can be changed in:
https://github.com/dzikoysk/Pandomium/blob/master/pandomium/src/main/java/org/cef/CefSettings.java#L71
but I am not sure how to change those. Do you have any ideas?

[dzikoysk]

Original source:

• CefSettings:144

CefSettings usage (this should be moved to PandomiumSettings):
https://github.com/dzikoysk/Pandomium/blob/5f294c24812bb44f50e54d2b9bb5ad4321e2fc31/pandomium/src/main/java/org/panda_lang/pandomium/wrapper/PandomiumThread.java#L35

Is it still not working if you launch application with sudo? Anyway, CefOverridePath could be helpful, but I can't find implementation of that in JCEF :/

[ensonic]

it will probably work if I run with sudo, I'll later just termporarily change ownership of that directory to test.

[ensonic]

I think there are more problems, will start asking on some cef related forum. I have temporarily chowned myself the jre dir (would be nice to find a fix for this still) and run it. strace reports a bunch of

SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR

Also sudo does not help.

[ensonic]

Args. When you download some of the file, this one was not executable. I'll check the code where it needs to be made executable.

chmod a+x /home/ensonic/projects/lego/gsoc/pandomium-example/native/jcef_helper

[ensonic]

The helper path is resolved here:
https://github.com/dzikoysk/Pandomium/blob/master/pandomium/src/main/java/org/cef/CefApp.java#L356
but that does not look like the best place to make the helper executable. What about this
https://github.com/dzikoysk/Pandomium/blob/master/pandomium/src/main/java/org/panda_lang/pandomium/loader/PandomiumNativeLoader.java#L71
I could also add a branch for MacOS. I'd use java.io.File.setExecutable(). If you agree I'll send a PR.

[dzikoysk]

Feel free to contribute. I don't have macOS, so I'm not even able to build natives for this system.