Last dash frame not posted to display

[Andrea Cimitan]

With the new dash as app, if I swipe to right from an app it goes back to dash but not on the app scope (or well it seems the index changes internally, because if I then flick right or left to switch scope I an see it jumps from the app scope)

To reproduce:

- go to video scope
- reveal launcher and open system settings
- swipe to right

expected result:
* app scope

current result:
* video scope (if you flick left from here you go to scopes scope, and you see jumping from app scope)

[Andrea Cimitan (cimi)]

We discovered that in reality it switches to the app scope, but visually we didn't get the last frame. We see the video scope but tapping on the dash opens apps from the app scope

[Michał Sawicz (saviq)]

This seems related to bug #1319907, but that was fixed, we need to have a close look on where is the frame lost.

[Michał Sawicz (saviq)]

Possibly same cause: bug #1351281

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

This bug was fixed in the package qtmir - 0.4.1+14.10.20140815-0ubuntu1

---------------
qtmir (0.4.1+14.10.20140815-0ubuntu1) utopic; urgency=low

  [ Daniel d'Andrada ]
  * MirSurfaceItem: always try to consume new mir frames Otherwise those
    frames will get dropped and MirSurfaceItem will therefore never use
    them, being left displaying an old, stale, frame until the
    application renders again.This could happen for instance if an
    application was rendering between the time the Application object
    goes to Suspended state and the actual process getting SIG_STOPPED
    (ie, suspended for real). Frames rendered in this interval were
    getting dropped and once that app was resumed and its MirSurfaceItem
    brought to front the user would see an old stale frame until some
    new event caused the application to render a new frame (e.g. an
    input event) (LP: #1353374)
 -- Ubuntu daily release <email address hidden> Fri, 15 Aug 2014 17:13:24 +0000