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Using software rendering ?

Hi,

  Recently, I'm going to compare the performance of hardware rendering and software rendering so I need to disable gpu to enable software rendering. The config file named "egl.cfg" manages libs used to render. I modified the config file (0 1 mali -> 0 0 android). Unfortunately, system UI has stopped. There's nothing on screen but a dialog(writing "system UI has stopped"). I dump the logcat. Here are part of logcat. system version: android 4.1.2. board:odroid-u3.

D/libEGL ( 1779): loaded /system/lib/egl/libGLES_android.so

D/AndroidRuntime( 1779): Shutting down VM

W/dalvikvm( 1779): threadid=1: thread exiting with uncaught exception (group=0x415cb300)

E/AndroidRuntime( 1779): FATAL EXCEPTION: main

E/AndroidRuntime( 1779): java.lang.RuntimeException: eglConfig not initialized

E/AndroidRuntime( 1779): at android.view.HardwareRenderer$GlRenderer.initializeEgl(HardwareRenderer.java:811)

E/AndroidRuntime( 1779): at android.view.HardwareRenderer$GlRenderer.initialize(HardwareRenderer.java:747)

E/AndroidRuntime( 1779): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1507)

It seems that eglConfig fail to initialize. Why and how can I solve it?

thank you !