[Interest] QML animation flickering on Ubuntu

[Dmitry Volosnykh]

Keith, thank you for your suggestion.

At least I've missed this feature in several places: "The value of the QML
property will be updated after the animation has finished. The property is
not updated while the animation is running."

Alas, it did not solve my issue. Honestly speaking, I did not believe it
may help, because with animations I had the following rendering table
(obtained after parsing qmlscene's output with QSG_RENDER_TIMING=1 set):

$ grep 'rendered' ubuntu12.02_5.4.log | egrep -o '[0-9]+ms' | sort -n |
uniq -c
 7 0ms
 2 1ms
 1 4ms
 1 5ms
 2 7ms
 1 8ms
 1 9ms
 3 10ms
 2 11ms
 3 12ms
 7 13ms
 15 14ms
 131 15ms
 791 16ms
 218 17ms
 43 18ms
 12 19ms
 4 20ms
 4 21ms
 1 23ms
 1 24ms
 1 27ms
 1 29ms
 4 33ms
 2 38ms
 1 45ms

So, most of the frames are rendered within 16 ms time frame provided.

I am getting more inclined to the idea that it is not Qt-related issue.
Something with my system, drivers, etc.

On Tue, Jan 13, 2015 at 8:21 PM, Keith Gardner <kreios4004 at gmail.com> wrote:

> Can something further be done to avoid flickering?
>>
>> If you are just translating the item by changing the X value, try using
> the XAnimator (http://doc.qt.io/qt-5/qml-qtquick-xanimator.html).  It
> performs the movement on the render thread instead of the gui thread.  I
> have experienced big performance gains when using the animators over the
> animations.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20150113/ae296ae9/attachment.html>