Stretched frame after rotation issue in Time&Date page of System Settings

[handsome_feng]

In System Settings, Time & Date page, rotating the device can exhibit a stretched frame - where the pre-rotation frame is stretched into the geometry the post-rotation frame would be.

$ system-image-cli -i
current build number: 240
device name: mako
channel: ubuntu-touch/devel-proposed/ubuntu
last update: 2015-06-30 03:56:26
version version: 240
version ubuntu: 20150629
version device: 20150529.1
version custom: 20150629

see the attached video.

[Albert Astals Cid (aacid)]

Gerry do you think this could be the shell painting the wrong frame? or is it that the app takes too much to send the new frame?

[Sebastien Bacher (seb128)]

Could you describe what you consider the issue? Is that the transient wrongly scaled text displayed for a second when you rotate the device back in portrait mode?

[handsome_feng (feng-kylin)]

@seb128 Yes, that's it.

[Gerry Boland (gerboland)]

@aacid Yeah System Settings app is taking too long to send a post-rotation frame. So shell uses the pre-rotation frame and stretches it.

The immediate fix is to figure out why it takes System Settings so long to submit a new frame - is it blocking for some reason?

Shell can take an action item to try be more forgiving of apps which submit post-rotation frames slowly. Most obvious idea being to only do the rotation animation once shell has received the post-rotation frame from the app. This idea will have its own issues to solve however, mostly in dealing with case of a frozen app.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

I think we can generalize this under bug 1466510.