Black screen on resume

[Christophe M]

Hi !

Sometimes (well, often) I get a black screen on resuming the app (app is still alive, sending heartbeat to server)

I'm running on a nexus 4

Here a the logcat, any idea ?

(I've tried the singleInstance trick but no luck)

I/ActivityManager(  603): START u0 {flg=0x24000000 cmp=org.REMOVEDt/org.qtproject.qt5.android.bindings.QtActivity bnds=[0,102][768,230]} from pid -1

W/ActivityManager(  603): startActivity called from non-Activity context; forcing Intent.FLAG_ACTIVITY_NEW_TASK for: Intent { flg=0x24000000 cmp=org.REMOVEDt/org.qtproject.qt5.android.bindings.QtActivity bnds=[0,102][768,230] }

W/Qt      ( 6613): ../src/androidjnimain.cpp:650 (void updateWindow(JNIEnv*, jobject)): updateWindow: Dirty screen not implemented yet on OpenGL

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:165 (virtual void QEGLPlatformContext::swapBuffers(QPlatformSurface*)): QEGLPlatformContext::swapBuffers(): eglError: 12301, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:165 (virtual void QEGLPlatformContext::swapBuffers(QPlatformSurface*)): QEGLPlatformContext::swapBuffers(): eglError: 12301, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:165 (virtual void QEGLPlatformContext::swapBuffers(QPlatformSurface*)): QEGLPlatformContext::swapBuffers(): eglError: 12301, this: 0x736af368 

W/Qt      ( 6613): 

I/WindowManager(  603): Screenshot Window{41ffdd88 u0 org.REMOVED/org.qtproject.qt5.android.bindings.QtActivity} was all black! mSurfaceLayer=21050 minLayer=21035 maxLayer=21050

(... other launch ...)

W/Adreno200-EGL( 6613): <qeglDrvAPI_eglMakeCurrent:2762>: EGL_BAD_SURFACE

E/libEGL  ( 6613): eglMakeCurrent:671 error 300d (EGL_BAD_SURFACE)

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:111 (virtual bool QEGLPlatformContext::makeCurrent(QPlatformSurface*)): QEGLPlatformContext::makeCurrent: eglError: 300d, this: 0x736af368 

W/Qt      ( 6613): 

E/libEGL  ( 6613): eglSwapBuffers:949 error 300d (EGL_BAD_SURFACE)

W/Qt      ( 6613): eglconvenience/qeglplatformcontext.cpp:165 (virtual void QEGLPlatformContext::swapBuffers(QPlatformSurface*)): QEGLPlatformContext::swapBuffers(): eglError: 12301, this: 0x736af368 

[BogDan Vatra]

Hi,

Qt4 or Qt5 ?

BogDan.

2013/11/7 Christophe M <meume...@gmail.com>:

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[Christophe M]

Qml - Qt 5.1
I'm testing with Qt 5.2 and it seems ok, I'll give you more feedback after more testing...

My app is forced landscape, with 5.2 when unlocking device and the app is in the foreground, I have a small square with a part of the app and the rest of the screen is white (see screnshoot).

Thanks ;)
Christophe

[George Calugar]

Hi,

For me this is happening using Qt4.8 with QML

Best regards,
George Calugar

---

From: BogDan Vatra
Sent: ‎11.‎11.‎2013 19:25
To: android-qt
Subject: Re: Black screen on resume

[piggz]

Im also getting a black screen when i force landscape.

using qt 5.2rc1

log states:

W/Qt (30079): ../src/androidjnimain.cpp:687 (void updateWindow(JNIEnv*, jobject)): updateWindow: Dirty screen not implemented yet on OpenGL

This happens on opening the app.  However, if i go to the home, and resume the app, it all appears.

[piggz]

Adding

android:hardwareAccelerated="true"

seems to have helped

On Monday, 11 November 2013 18:50:12 UTC, CMGeorge wrote: