Public bug reported:

Testing new aethercast changes (https://requests.ci-
train.ubuntu.com/#/ticket/1620) and found unity8 is crashing when it
switches after a timeout automatically to the lock screen.

This is on

current build number: 142
device name: frieza
channel: ubuntu-touch/rc-proposed/bq-aquaris-pd.en
last update: 2016-07-13 05:57:58
version version: 142
version ubuntu: 20160713
version device: 20160622.0
version custom: 20160712--42-19-vivid

SEGV backtrace:

 #0  0xe656f40e in MirBufferSGTexture::bind() () from 
/usr/lib/arm-linux-gnueabihf/qt5/qml/Unity/Application/libunityapplicationplugin.so
 No symbol table info available.
 #1  0xf6f605e2 in 
QSGOpaqueTextureMaterialShader::updateState(QSGMaterialShader::RenderState 
const&, QSGMaterial*, QSGMaterial*) () from 
/usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
 No symbol table info available.
 #2  0xf6f5194a in 
QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) 
() from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
 No symbol table info available.
 #3  0xf6f527c8 in QSGBatchRenderer::Renderer::renderBatches() () from 
/usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
 No symbol table info available.
 #4  0xf70d2f48 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5

** Affects: unity8 (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "_usr_bin_unity8.32011.crash"
   
https://bugs.launchpad.net/bugs/1602950/+attachment/4700604/+files/_usr_bin_unity8.32011.crash

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https://bugs.launchpad.net/bugs/1602950

Title:
  Unity8 crashes when switching back to lockscreen while using WiDi

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