Carousel doesn't re-render properly after scrolling

Bug #1307578 reported by Michal Hruby on 2014-04-14
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
qtdeclarative-opensource-src (Ubuntu)
Undecided
Timo Jyrinki
Trusty
Undecided
Timo Jyrinki
unity8 (Ubuntu)
Undecided
Unassigned
Trusty
Undecided
Unassigned

Bug Description

[Impact]
Some list views are completely empty at times. ItemView/PathView fails to create the delegates when the delegate component and model are set after view creation.

[Test Case]
When scrolling in for example music scope all the way down, and then up again, from time to time the carousel on the top remains empty and doesn't render anything.

[Regression Potential]
No regressions have been noticed with the same patch in utopic so far. Upstream has also not changed the files in question after the patch went in there.

Related branches

Changed in unity8:
assignee: nobody → Albert Astals Cid (aacid)
importance: Undecided → High
Michał Sawicz (saviq) on 2014-04-14
Changed in unity8:
status: New → Confirmed
status: Confirmed → Triaged
Albert Astals Cid (aacid) wrote :

Due to some optimization changes we did to the Carousel we are now hitting an upstream bug.

http://bugreports.qt-project.org/browse/QTBUG-38368

Patch at https://bugreports.qt-project.org/browse/QTBUG-38368

Changed in unity8:
status: Triaged → Invalid
Albert Astals Cid (aacid) wrote :
Changed in qtdeclarative-opensource-src (Ubuntu):
assignee: nobody → Timo Jyrinki (timo-jyrinki)
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package qtdeclarative-opensource-src - 5.2.1-5ubuntu1

---------------
qtdeclarative-opensource-src (5.2.1-5ubuntu1) utopic; urgency=medium

  * Resync with Debian including renamed QML packages (LP: #1313547)
  * Depend conditionally on libgl1 (LP: #1278871)
  * debian/patches/Fix-marking-of-prototype-objects-in-chain.patch
    - Fix a crasher with deleted QQmlCompiledData as suggested by upstream
      (LP: #1304248)
  * debian/patches/QQuickItemView-QQuickPathView-Fix-creation-of-delega.patch:
    - Fix "Carousel doesn't re-render properly after scrolling"
      (LP: #1307578)
  * debian/patches/Implement-proper-support-for-layoutChange-in-QQmlDel.patch:
    - Fix a performance hit when editing sorted lists (LP: #1303746)
  * debian/patches/V4-regalloc-fix-register-spill-choice-under-high-pre.patch:
    - Fix differing JS results on AMD64/i386 (LP: #1312571)
  * Updated symbols
 -- Timo Jyrinki <email address hidden> Mon, 28 Apr 2014 07:35:22 +0000

Changed in qtdeclarative-opensource-src (Ubuntu):
status: New → Fix Released
Changed in qtdeclarative-opensource-src (Ubuntu Trusty):
assignee: nobody → Timo Jyrinki (timo-jyrinki)
status: New → In Progress
description: updated
Timo Jyrinki (timo-jyrinki) wrote :

The 14.04 LTS SRU fix for this is now published and currently resides in the unapproved queue of SRU uploads. After the SRU team has looked at it, it will be copied to proposed updates and at that time this bug will be updated to ask for yet another round of testing.

Hello Michal, or anyone else affected,

Accepted qtdeclarative-opensource-src into trusty-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/qtdeclarative-opensource-src/5.2.1-3ubuntu15.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in qtdeclarative-opensource-src (Ubuntu Trusty):
status: In Progress → Fix Committed
tags: added: verification-needed
Timo Jyrinki (timo-jyrinki) wrote :

I'm not able to trigger the bug with trusty image + this proposed update. Also, no regressions in autopilot tests or exploratory testing.

tags: added: verification-done
removed: verification-needed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package qtdeclarative-opensource-src - 5.2.1-3ubuntu15.1

---------------
qtdeclarative-opensource-src (5.2.1-3ubuntu15.1) trusty; urgency=medium

  * debian/patches/QQuickItemView-QQuickPathView-Fix-creation-of-delega.patch:
    - Fix "Carousel doesn't re-render properly after scrolling"
      (LP: #1307578)
  * debian/patches/Implement-proper-support-for-layoutChange-in-QQmlDel.patch:
    - Fix a performance hit when editing sorted lists (LP: #1303746)
  * Update libqt5qml5.symbols (two symbols from the latter patch)
 -- Timo Jyrinki <email address hidden> Fri, 02 May 2014 07:31:28 +0300

Changed in qtdeclarative-opensource-src (Ubuntu Trusty):
status: Fix Committed → Fix Released

The verification of the Stable Release Update for qtdeclarative-opensource-src has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

Michał Sawicz (saviq) on 2017-03-13
Changed in unity8 (Ubuntu Trusty):
status: New → Invalid
Changed in unity8 (Ubuntu):
status: New → Invalid
no longer affects: unity8
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