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

 

@Andrea

A few questions/requests....

1. Please attach your syslog to the bug

2. Are you connected to an access point when the problem occurs?

3. Have you made the phone write-able and installed any packages via
apt-get and/or modified the filesystem in any way?

4. Can you recall any changes that occurred between your original report
and the new level of problems as mentioned in comment #3?

The current version of NM in our images has a bug which prevents
periodic scanning of WiFi access points, so I'm a bit wary to pin this
on NM.  Also, the DBus message you point out in comment #3 appears to be
from Upstart, not NM.

** Changed in: network-manager (Ubuntu)
       Status: Confirmed => Incomplete

** Changed in: network-manager (Ubuntu)
     Assignee: (unassigned) => Andrea Bernabei (faenil)

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

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

Status in indicator-network package in Ubuntu:
  New
Status in network-manager package in Ubuntu:
  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