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[Bug 1480877] Re: Access points' "PropertiesChanged" dbus signals freeze UI on mobile devices

 

This bug was fixed in the package dbus-cpp 4.3.0+15.04.20151126-0ubuntu1
in https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/stable-
phone-overlay

---------------

dbus-cpp (4.3.0+15.04.20151126-0ubuntu1) vivid; urgency=medium

  [ CI Train Bot ]
  * New rebuild forced.

  [ Thomas Voß ]
  * Ensure that Signal with non-void argument types correctly narrow
    their match rules. (LP: #1480877)

 -- Thomas Voß <ci-train-bot@xxxxxxxxxxxxx>  Thu, 26 Nov 2015 07:31:37
+0000


** Changed in: dbus-cpp (Ubuntu RTM)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1480877

Title:
  Access points' "PropertiesChanged" dbus signals freeze UI on mobile
  devices

Status in Canonical System Image:
  Fix Committed
Status in Unity 8:
  New
Status in dbus-cpp package in Ubuntu:
  In Progress
Status in network-manager package in Ubuntu:
  Incomplete
Status in qtbase-opensource-src package in Ubuntu:
  Fix Committed
Status in dbus-cpp package in Ubuntu RTM:
  Fix Released
Status in location-service package in Ubuntu RTM:
  Fix Released
Status in network-manager package in Ubuntu RTM:
  Incomplete

Bug description:
  Krillin, rc-proposed, r83

  
  DESCRIPTION:
  I've been trying to track down the cause of the occasional UI freezes on my Krillin device, and I noticed that whenever the UI freezes for 2-4 seconds, I get a burst of "PropertiesChanged" signals in dbus-monitor

  Here's a log of what's shown in dbus-monitor:
  http://pastebin.ubuntu.com/11992322/

  I'd guess the problem is in the code that actually catches the signals
  and acts accordingly.

  HOW TO REPRODUCE: 
  1) Move to a place where many wifi hotspots are available
  2) Connect the device via USB and run "phablet-shell" and then "dbus-monitor"
  3) Use the device while keeping an eye on dbus-monitor output

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References