[Bug 1528886] Re: Checking for updates never finishes

[royden]

Yes, now working again on wifi

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

** Changed in: canonical-devices-system-image
   Status: Fix Committed => Fix Released

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

It started working, I checked three times in a row and it was
successful, will track this further to see if updating continues working
properly.

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

This is happening to me on BQ Aquaris E4.5 with OTA-10 for a few days
now regardless of whether I use wifi or 3g, checking for updates never
finishes, I did a tracepath to system-image.ubuntu.com as recommended to
me on the IRC, and my network reaches Canonical server fine, but after
that nothing happens. To be precise tracepath reaches:

te2-1.jotunn.canonical.com

And then I get "no reply" over and over again. I removed Ubuntu One
account, readded it, rebooted the phone and nothing. I can install
applications from the Store, but checking for updates never finishes, or
to be more precise, it does "finish" (fails) after a long time with the
error message how I should connect to the Internet. Internet otherwise
works fine on the phone, phone is not made rw nor it has any special
modifications, I run vanilla OTA-10 with no tinkering whatsoever.

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[Bug 1528886] Re: Checking for updates never finishes

[royden]

I can confirm that this also occurs on my Mx4, rc-proposed  r303. This
is a regression, as it was fixed.

Issue of update check not finishing happens only on wifi for me.
Completes fine on GPRS.

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[Bug 1528886] Re: Checking for updates never finishes

[Wangtim]

Hello, I never had this bug until I upgraded to OTA10. Since OTA 10 checking 
for updates never ends, but only when the wifi is on. If I use only the 3G 
network, checking finishes in a few seconds. Any ideas if I can solve this, 
it's quite annoying...
I have a BQ E4.5. Thanks !

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

** Changed in: connectivity-api (Ubuntu)
   Status: Confirmed => Invalid

** Changed in: ubuntu-system-settings (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 1528886] Re: Checking for updates never finishes

[Launchpad Bug Tracker]

This bug was fixed in the package qtbase-opensource-src - 5.5.1+dfsg-
13ubuntu2

---
qtbase-opensource-src (5.5.1+dfsg-13ubuntu2) xenial; urgency=medium

  * Forward-port networking fixes from 5.4 series:
- net-bearer-nm-disconnect-ap-signals7.patch (LP: #1480877)
- qnam-ubuntu-fix6.patch (LP: #1528886)
- xenial would potentially now have fixes for (LP: #1506015)
  (LP: #1507769) (LP: #1533508)

 -- Timo Jyrinki   Tue, 09 Feb 2016 08:19:43
+

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

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

** Changed in: canonical-devices-system-image
   Status: In Progress => Fix Committed

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[Bug 1528886] Re: Checking for updates never finishes

[Łukasz Zemczak]

This bug was fixed in the package qtbase-opensource-src 5.4.1+dfsg-
2ubuntu11~vivid4 in https://launchpad.net/~ci-train-ppa-
service/+archive/ubuntu/stable-phone-overlay

---

qtbase-opensource-src (5.4.1+dfsg-2ubuntu11~vivid4) vivid;
urgency=medium

  * Lorn Potter's networking fixes:
- debian/patches/Make-sure-to-report-correct-NetworkAccessibility.patch
- debian/patches/Make-sure-networkAccessibilityChanged-is-emitted.patch
- debian/patches/Fix-hang-in-qnam-when-disconnecting.patch
- debian/patches/Make-UnknownAccessibility-not-block-requests.patch
- debian/patches/qnam-ubuntu-fix6.patch (not yet upstreamed)
(LP: #1470700) (LP: #1506015) (LP: #1507769) (LP: #1528886) (LP: #1533508)
  * debian/patches/Add-an-option-to-skip-the-generic-bearer-engine.patch
- Backport to replace disable-generic-plugin-when-others-available.patch

 -- Timo Jyrinki   Mon, 14 Dec 2015 12:53:41
+


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

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[Bug 1528886] Re: Checking for updates never finishes

[Kyle Nitzsche]

** Changed in: today-scope
   Status: New => Invalid

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

armhf build for vivid just finished in silo 32, version 5.4.1+dfsg-
2ubuntu11~vivid4~test6.

gles and xenial packages updated too.

Testing welcome again, and I'll install it on my daily phone.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

Alrighty then! patch #6
This seems to work with Today, euronews scopes, and doesn't hang!

** Patch added: "qnam-ubuntu-fix6.patch"
   
https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1528886/+attachment/4566541/+files/qnam-ubuntu-fix6.patch

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[Bug 1528886] Re: Checking for updates never finishes

[Kyle Nitzsche]

HI Lorn, just noting that scopes *generally receive the network
connectivity status as an enum passed to them from the unity-scopes-
shell as metadata.  The only thing that scope-aggregator does with the
network status is (depending on the scope config), it displays a "Hey,
no network" type message. Beyond this, responding reasonably to no-
network conditions is up to child scopes.

Not sure it is relevant, but I have found an issue with this enum:
https://bugs.launchpad.net/ubuntu/+source/unity-scopes-
api/+bug/1502282/comments/24

* I say "generally" because scopes *can* take additional steps.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

The Euronews scope also seems to have network issues, so maybe the scope
scope-aggregator  has issues with this. I'll dig into that code to see
if I can find something. At least a way to test this condition.

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

As I started testing on my main daily phone, I noticed that there is
trouble with the Today scope when using the silo 32. It has problems
obtaining data / refreshing itself. It seems reproduable, but it's also
the only scope that seems to have problems. Maybe it's doing something
peculiar workarounding the existing networking problems?

Such a regression would of course not be acceptable. Reproducing of the
problem would be welcome.

** Also affects: today-scope
   Importance: Undecided
   Status: New

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

I think we should now gather more tests from others since the networking
fixes are plenty and it'd be useful to know if other bugs are properly
fixed now too, and especially that there would be no regressions.

I'll ping on the other possibly related bugs to get more test coverage.
If we have the fix and find no regressions, QA can start evaluating the
silo.

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

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

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

** Tags added: connectivity

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

Still working for me!

How to test this:

Open system settings and click on Updates and then quickly switch wifi
off or on

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

Silos 032 (vivid) and 057 (xenial) updated with the patch. I will later
join them together to 032 since ubuntu-touch-session was just converted
into dual landing.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

One more time...
This one works better in that is doesn't sit and spin. It will at least say 
"connect to the internet" when the connection changes.

** Patch added: "qnam-ubuntu-fix5.patch"
   
https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1528886/+attachment/4561759/+files/qnam-ubuntu-fix5.patch

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[Bug 1528886] Re: Checking for updates never finishes

[Bill Filler]

** Changed in: canonical-devices-system-image
   Status: Confirmed => In Progress

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[Bug 1528886] Re: Checking for updates never finishes

[Bill Filler]

** Changed in: canonical-devices-system-image
   Importance: High => Critical

** Changed in: ubuntu-system-settings (Ubuntu RTM)
   Importance: Undecided => Critical

** Changed in: qtbase-opensource-src (Ubuntu)
   Importance: Undecided => Critical

** Changed in: qtbase-opensource-src (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: ubuntu-system-settings (Ubuntu)
   Importance: Undecided => Critical

** Changed in: ubuntu-system-settings (Ubuntu)
 Assignee: (unassigned) => Ken VanDine (ken-vandine)

** No longer affects: ubuntu-system-settings (Ubuntu RTM)

** Changed in: canonical-devices-system-image
 Assignee: Bill Filler (bfiller) => John McAleely (john.mcaleely)

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

grrr... At least I can reliably reproduce this:

Start with wifi off and system settings open.
have adb shell or ssh into device.

check for updates
quickly run the command: nmcli radio wifi on

Update should either complete or have an error and should not get stuck
at "checking for updates..."

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

fix3 patch will be available as ~test4 in silo 032 for vivid-overlay /
Qt 5.4 (and independently as ~test3 in silo 057 for xenial / Qt 5.5)

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

I replaced the former patch with the fix2, ~test3 is building in silo
032 with that included.

The only minor changes to the patch: fixing paths, removing the removed
"qDebug()" line from the last hunk since it's not in the original code.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

Just tested fix2 package, does not seem to be working entirely correct yet. 
Maybe I missed something in that patch.
It seems to report isOnline is false, quickly followed by true, which seems to 
confuse things...

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

alright, attached is yet another fixup. I used quilt this time, so it
should be about good to go.

The only thing I have not really tested is when only connected to mobile data, 
and the connection is bad or weak, and it keeps disconnecting and disconnects 
in the middle of an update request.
It seems when I want to test it this way, I will have good reception. I will 
keep trying and test it when the opportunity arrives.

** Patch added: "qnam-ubuntu-fix3.patch"
   
https://bugs.launchpad.net/canonical-devices-system-image/+bug/1528886/+attachment/4554516/+files/qnam-ubuntu-fix3.patch

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

2nd patch here that I am fairly certain fixes this in QNAM as well as in
the nm bearer plugin (making the defaultConfiguration switch when
default connection actually changes). It also optimizes the bearer
plugin a bit.

I have an auto test to be run on a phone to test for this, but I haven't
put it anywhere just yet.


** Patch added: "qnam-ubuntu-fix2.patch"
   
https://bugs.launchpad.net/canonical-devices-system-image/+bug/1528886/+attachment/4553861/+files/qnam-ubuntu-fix2.patch

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

seems #2 in comment #34 still is not fixed.

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[Bug 1528886] Re: Checking for updates never finishes

[Ubuntu Foundations Team Bug Bot]

The attachment "qnam-ubuntu-fix.diff" seems to be a patch.  If it isn't,
please remove the "patch" flag from the attachment, remove the "patch"
tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the
team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

Updated to silo 032. Unit tests pass, although the builders run without
network manager so it's using the generic bearer.

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

@Lorn

What was broken in QNetworkAccessManager?

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Title:
  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

1) QNAM was only being signalled when the online state of nm changed. Since 
mobile data remains online when wifi connects, the online state never changes 
when the default route moves to wifi. Thus QNAM/QNetworkRequest was not 
following the correct configuration/session. The session would never signal the 
connected state (because it was already connected and didn't change) This means 
that the request would never migrate/resume to new connection, and would wait 
for proper session state to actually start the operation, which would never 
come. 

Haven't looked into why it would not timeout in a reasonable amount of
time.

2) Sometimes QNAM would get confused by #1 and set itself to
NotAccessible, thus blocking the request and issuing error 99
(UnknownNetworkError)

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

I believe I have fixed this against landing-032, patch attached

It needs more testing, including upstream autotests.




** Patch added: "qnam-ubuntu-fix.diff"
   
https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1528886/+attachment/4548354/+files/qnam-ubuntu-fix.diff

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[Bug 1528886] Re: Checking for updates never finishes

[Launchpad Bug Tracker]

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

** Changed in: connectivity-api (Ubuntu)
   Status: New => Confirmed

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[Bug 1528886] Re: Checking for updates never finishes

[Launchpad Bug Tracker]

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

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

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

ok. I thought it was fixed, but as I have investigated it further in
qnetworkaccessmanager, I was somehow fooled and that landing does not
fix this.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

I tested landing-032 and system-settings at least does not hang at
'checking for updates' when on mobile data (it now checks and when it
completes says 'connect to the internet to check for updates')


landing-032 contains needed fixes in QtNetworkAccessManager (including this 
bug), and would be present with any bearer plugin without them.

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

This seems to be working now as expected (usinglanding-032) without the
'connect to the internet to check for updates'

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

Seems this did not totally fix this, it will still hang at 'checking' if
I switch off wifi and then quickly check for updates, but will work if I
press back and then check again.

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

Adding a Qt tasks for the network bearer and a connectivity api task as
we don't know where in the stack we are getting confused

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

** Also affects: connectivity-api (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

There's the old silo 032 still which I just updated before the holidays
to be up-to-date. With the recent network manager bearer OTA 8.5 fix
it's no longer obviously blocked (bug #1508945 got fixed as a side
effect), but it's still not a patch set I'm comfortable considering
landing before it's more widely tested because it obviously did used to
cause regressions in our case, even though via the route of apparmor
blocking DBus Network Manager calls.

Included network related patches (or Lorn's from upstream):
  * debian/patches/Make-sure-to-report-correct-NetworkAccessibility.patch
  * debian/patches/Make-sure-networkAccessibilityChanged-is-emitted.patch
  * debian/patches/Fix-hang-in-qnam-when-disconnecting.patch
  * debian/patches/Make-UnknownAccessibility-not-block-requests.patch

(plus changing the generic plugin skipping to be done via env var as
merged in upstream)

The other bugs I've figured might be related are bug #1507769 and bug
#1506015.

If there's any doubt, switching to the connectivity-api bearer might be
better to do first.

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[Bug 1528886] Re: Checking for updates never finishes

[Timo Jyrinki]

(s/or Lorn's/all Lorn's)

The diff to current overlay is at: https://ci-train.ubuntu.com/job
/ubuntu-landing-032-1-build/lastSuccessfulBuild/artifact/qtbase-
opensource-src_vivid_content.diff + the ubuntu-touch-session in the PPA
that adds the environment variable.

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

** Changed in: canonical-devices-system-image
 Assignee: Pat McGowan (pat-mcgowan) => Bill Filler (bfiller)

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

** Changed in: qtbase-opensource-src (Ubuntu)
 Assignee: (unassigned) => Lorn Potter (lorn-potter)

** Changed in: connectivity-api (Ubuntu)
 Assignee: (unassigned) => Pete Woods (pete-woods)

** Changed in: ubuntu-system-settings (Ubuntu RTM)
 Assignee: (unassigned) => Ken VanDine (ken-vandine)

** Changed in: canonical-devices-system-image
Milestone: backlog => ww08-2016

** Changed in: canonical-devices-system-image
 Assignee: (unassigned) => Pat McGowan (pat-mcgowan)

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

Possibly related to the issue where the network status is inconsistent

** Changed in: canonical-devices-system-image
   Importance: Undecided => High

** Changed in: canonical-devices-system-image
   Status: New => Confirmed

** Changed in: canonical-devices-system-image
Milestone: None => backlog

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  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[royden]

Given that "download" appears as the option, if you are correct,
that is a rather poor choice of word. I assume that
"detect an update" and "download" are different. Am I wrong,
because I believe that I detect them on 3G even though I do
not want to auto-download them?

Seasons's greetings to all

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[Bug 1528886] Re: Checking for updates never finishes

[Victor gonzalez]

Please note that if you want to detect updates through 3G you should
select "on any data connection" in auto download options

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[Bug 1528886] Re: Checking for updates never finishes

[Victor gonzalez]

We also have reproduced this behaviour here in BQ, details below:

Scenario 1 Time 12:04

Krillin: rc-211 -->  On Wi-Fi was able to detect update (rc215), on 3G wasn't 
able to see rc215
Vegeta OTA8.5 --> On wifi was able to detect updates, on 3G too

After the updates available

Scenario 2 Time 12:13

Krillin: rc-215 -->  On Wi-Fi  says "Connect to the internet to check for 
updates" after few minutes, on 3G took around 12 min to say "SW up to date"
Vegeta OTA8.5 --> On Wi-Fi  says "Connect to the internet to check for updates" 
after few minutes, on 3G took around 12 min to say "SW up to date"


** Attachment added: "Scenario-1.mp4"
   
https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1528886/+attachment/4541292/+files/Scenario-1.mp4

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[Bug 1528886] Re: Checking for updates never finishes

[Victor gonzalez]

Logs attached from both devices (hope they are useful)

** Attachment added: "syslog_vegeta+krillin.zip"
   
https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1528886/+attachment/4541310/+files/syslog_vegeta%2Bkrillin.zip

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[Bug 1528886] Re: Checking for updates never finishes

[JoiHap]

Same problem here on a BQ Aquaris 4.5 after OTA 8.5 update, connected
through WiFi or 3G, no updates whatsoever. Additionally, sometimes the
system settings crashes on hitting "check for updates".

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

For some reason checking for updates works for me since yesterday, I
will monitor the situation.

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[Bug 1528886] Re: Checking for updates never finishes

[Marcos Lans]

For days now I had that bug on my BQ Ubuntu. Suddenly today update
feature seems to work again.

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

** Description changed:

  Tested on krillin with SIM and data enabled
  OTA 8.5 stable channel
  Also Arale on proposed 201
  
  Ensure phone has latest updates installed
- Check for update on Wifi and it reports software is up to date 
+ Check for update on Wifi and it reports software is up to date
  Turn off wifi and go to updates panel again
+ Note that the indicator shows and active 3G data connection
  Checking for updates ... is shown and I see one of 3 results
  
  In all cases the log reports:
  
  2015-12-23 15:34:19,394 - WARNING - void
  UpdatePlugin::Network::checkForNewVersions(QHash&)
  
  2015-12-23 15:44:56,007 - WARNING - Reply is not valid.
  
  In some instances I see this but not all, this is logged when the phone locks 
and resumes
  2015-12-23 15:36:18,625 - WARNING - QObject::killTimer: Timers cannot be 
stopped from another thread
  2015-12-23 15:36:18,625 - WARNING - QObject::startTimer: Timers cannot be 
started from another thread
  
- One time I saw 
+ One time I saw
  Connect to the Internet ...
  
  In anther case it displayed this after around 5 mins when I did not allow the 
phone to turn off:
  Software is up to date
  
  In all other cases Checking for updates never finished

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[Bug 1528886] Re: Checking for updates never finishes

[Pat McGowan]

I got a call on the arale after round 10 mins, andupdate checking worked
but the krillin still does not (I called it as well)

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[Bug 1528886] Re: Checking for updates never finishes

[Launchpad Bug Tracker]

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

** Changed in: ubuntu-system-settings (Ubuntu)
   Status: New => Confirmed

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

So basically what I'm seeing is that system-settings doesn't recognize
the change of networking technology, and eventually times out after
4-5m, at which point the "Connect to the Internet" message is displayed.
I have yet to see the spinner go forever as Pat suggests.   I did
however hit a crash in system-settings after the fourth or fifth time I
ran my test scenario.  I'll paste the backtrace in a subsequent comment.

I tested using a US AT SIM, which means I'm limited to 2G only on my
krillin.  I also disabled automatic updates on both phones before
testing.

Here's my exact scenario, which I ran 5 times on krillin ( OTA8 + OTA8.5
), and arale ( OTA8.5 ):

1. Boot the phone w/WiFi enabled & a previously connected access point
available; after booting, verify the phone is connected to WiFi.

2. Launch SystemSettings::Updates

( Note, unlike Pat... I didn't install all available updates.  So for
OTA8.5 testing run today, 4 click updates are shown as available.  For
OTA8, an Ubuntu update is visible, along with 8 click updates. )

3. Return to main settings page

4. Disable WiFi, and *wait* for the network indicator to change from
WiFi to 'E' ( on Krillin ) or 'H' ( on arale ).

5. Re-open Updates

This scenario results in three different results, partially depending on
the speed of my network connection:

 * updates were shown promptly ( < 30s )
 * the spinner appeared, and updates were eventually shown after some delay ( 
30s - 4m );  sometimes when this happened, only the Ubuntu update would be 
shown ( ie. I didn't see the available click updates )
 * the spinner appeared, and somewhere between 4-5m, the "Connect to Internet" 
message would be displayed

I basically saw little difference between OTA8 and OTA8.5 in my testing
on krillin.   With OTA8.5, I hit the "Connect..." scenario 3/5 tries.
On OTA8, I hit it 2/5 times.  On arale running OTA8.5, I hit it 2/5 as
well.

Note, during each test I always verified that the network connection was good 
by running the following two commands:
 
$ nmcli d
$ ping ubuntu.com

>From my point of view, Pat's original scenario doesn't seem to be a
regression introduced by OTA8.5.

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

Switching ocassionally happened, but as a rule it almost never works
regardless to what network I am connected and whether its wifi or 3g, I
didnt notice switching between wifi and 3g changed anything, problem
persists in all scenarios. And yes browser and ping work when checking
for updates doesnt, I thought it was my home Internet acting weird but I
tested it on two other wifi networks with the same results, checking for
updates doesnt work in 99.9% of ocassions. Today I managed to get it
through once.

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

I also mentioned a crash above.  This occurred after my fourth or fifth
try on krillin/OTA8.5.   When I clicked the back button to return to the
main settings page, the page was rendered with stretched icons, then it
crashed and I had to relaunch.

The backtrace from the crashfile looks like this:

== Stacktrace =
#0  0x in ?? ()
No symbol table info available.
#1  0xabd3aa46 in ?? () from /usr/lib/arm-linux-gnueabihf/ubuntu-system-settings
/libupdate-plugin.so
No symbol table info available.
#2  0xb6dc2ad2 in QMetaObject::activate(QObject*, int, int, void**) () from /usr
/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#3  0xb5d13a9c in QNetworkConfigurationManager::onlineStateChanged(bool) () from
 /usr/lib/arm-linux-gnueabihf/libQt5Network.so.5
No symbol table info available.
#4  0xb5d13ef6 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Network.so.5
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

@Pat

You mention errors in logs, however I didn't see any messages in syslog.
Which log file were you looking at?

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

@Cerebus

Regarding your comment #3, were you switching back and forth from mobile
to WiFi when you saw problems?

The one relevant bit of information in comment #4 is that bug #1270189
may be involved when switching from the mobile connection to a WiFi
connection.  Did you verify that you actually had a working WiFi
connection ( ie. via the browser, ping, ... )?

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

I flashed my krillin with stable #23, which I'm pretty sure equates to
OTA8.  I tested with an active US T-Mobile SIM ( Edge only ).

I'm not able to reproduce the bug as described.

Note, I first disabled auto-updates to ensure they weren't getting in
the way.

The only peculiar behavior I observed was that the Updates UI would
always display the Ubuntu update ( r24 ) as available, and then would
display the click updates after some amount of time passed ( usually
5-10s, but sometimes as long as 30s to 1m ).  Sometimes though, the
click updates would never be listed.  This seems to equate to a
situation where NM shows that an active connection exists, but the
network isn't actually reachable, or DNS isn't behaving correctly ( see
related bug #1270189 ).

I only saw "Connect to the Internet" once, and never saw the UI just
hang as described.

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Title:
  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

Please disregard comment #4, as I didn't correctly flash from the right
channel.  More test results pending...

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Title:
  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

BQ Aquaris E4.5 on OTA-8.5, this is constantly happening on several
different wifi networks, on very very rare ocassions the check is
successful, but otherwise it fails constantly.

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  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Cerberus]

@Tony Espy-UI doesnt hang for me, it just continually checks for updates
until it gives back an error. And you say OTA-8, it was fine with OTA-8,
this issue started with OTA-8.5. At first I thought update servers are
having a problem, but the issue persists.

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  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Tony Espy]

** Also affects: ubuntu-system-settings (Ubuntu RTM)
   Importance: Undecided
   Status: New

** Changed in: ubuntu-system-settings (Ubuntu RTM)
   Status: New => Confirmed

** Also affects: canonical-devices-system-image
   Importance: Undecided
   Status: New

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  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[royden]

My current situation Arale r202:

Tested working wifi - update checker does not complete in normal time.

Switch off wifi, enable mobile data 3G available, update checker
completes.

Switch off mobile data, turn on wifi (working), checker does not
complete normally.

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  Checking for updates never finishes

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[Bug 1528886] Re: Checking for updates never finishes

[Lorn Potter]

I hate to say it, but this sounds like a bug in qnam/qtbearer I have
been chasing where the default configuration does not get switched back
from wifi to an already/still connected mobile data connection.

Perhaps 
https://bugreports.qt.io/browse/QTBUG-49760
or
https://bugreports.qt.io/browse/QTBUG-49581
perhaps?

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  Checking for updates never finishes

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