I don't think it is caused by the system running low on memory. I saw this
issue this morning on arale and the system has plenty of memory free:
total used free shared buffers cached
Mem: 1937952 1327364 610588 31468 11028 254584
-/+ buffers/cache: 1061752 876200
Swap: 524284 0 524284
There are these suspicious lines in .cache/upstart/unity8-dash.log
QNetworkReplyImplPrivate::error: Internal problem, this method must only be
called once.
file:///usr/share/unity8//Components/LazyImage.qml:91:16: QML Image: Cannot
open: file:///usr/share/unity8//Dash/Previews/broken_image
file:///usr/share/unity8//Components/LazyImage.qml:91:16: QML Image: The
specified configuration cannot be used.
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:82: Error:
Cannot assign [undefined] to QUrl
file:///usr/share/unity8//Components/LazyImage.qml:91:16: QML Image: The
specified configuration cannot be used.
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:82: Error:
Cannot assign [undefined] to QUrl
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:124:23: QML
QQuickImage: The specified configuration cannot be used.
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:138: Error:
Cannot assign [undefined] to QUrl
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:124:23: QML
QQuickImage: The specified configuration cannot be used.
file:///usr/share/unity8//Dash/Previews/PreviewImageGallery.qml:138: Error:
Cannot assign [undefined] to QUrl
file:///usr/share/unity8//Dash/Previews/PreviewHeader.qml:81:28: QML
QQuickImage: The specified configuration cannot be used.
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https://bugs.launchpad.net/bugs/1507769
Title:
App store does not display images when system memory is low
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