group.of.nepali.translators team mailing list archive

[Dmitry Shachnev <mitya57@xxxxxxxxx>]

Elvis: sorry for not responding. Sometimes pinging the bug *is* helpful.

I will not have time to do a SRU in the next days, but I might take a
look a bit later if nobody beats me to it. In the meantime, it would
help if you could fill the SRU bug template, see
https://wiki.ubuntu.com/StableReleaseUpdates#Procedure.

** Also affects: qtbase-opensource-src (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: qtbase-opensource-src (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1598173

Title:
  Please consider SRU of "xcb: Compress mouse motion and touch update
  events"

Status in qtbase-opensource-src package in Ubuntu:
  Fix Released
Status in qtbase-opensource-src source package in Xenial:
  New

Bug description:
  A fix for QTBUG-40889 was worked out and submitted at

      https://codereview.qt-project.org/#/c/115531/

  but due to coming in a bit late, was moved to Qt 5.6

      https://codereview.qt-project.org/#/c/126136/

  The bug is about mouse motion event compression malfunctioning, and it
  has grave consequences for some applications, where the flood of
  events make rendering sluggish (e.g. anything based on VTK, but
  probably others).

  ParaView developer Ben Boeckel has tried the patch [2] against 5.5 and
  confirmed it fixes rendering/interaction in VTK applications.

  It is not possible to work around the bug at the application level in
  a satisfactory way, only by resorting to timer-based rendering.

  I suggest an SRU to patch the Ubuntu Qt package with the patch that
  was originally meant for the 5.x branch (first URL above). The patch
  was later integrated in 5.6 where it has been well tested.

  [1] https://bugreports.qt.io/browse/QTBUG-40889
  [2] http://vtk.1045678.n5.nabble.com/Delayed-mouse-interaction-due-to-event-loop-bug-in-Qt5-tp5730474p5732870.html

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