ubuntu-phone team mailing list archive

[Thibaut Dedreuil_monet <dedreuil@xxxxxxxx>]

On Mon, 16 Mar 2015 14:44:30 -0400
Tony Espy <espy@xxxxxxxxxxxxx> wrote:

> On 03/15/2015 11:21 AM, Michael Zanetti wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Hi,
> >
> > since a week or two I notice increased instability of connectivity on
> > my krillin device during daily usage.
> >
> > The symptoms are visible in that networking starts failing to connect.
> > Mostly when switching from WiFi to 3G or back. At some point it just
> > stops connecting to 3G or WiFi and it stops listing wireless networks
> > at all. Making phone calls doesn't work any more either although the
> > indicator suggests it would be registered to GSM.
> 
> Based on the image # you provided below, you're running RTM, correct?
> 
> I've actually been focused on networking isssues with vivid for the last 
> few weeks now, as a new network-manager ( 0.9.10 ) had landed a few 
> weeks back and has caused some regressions.
> 
> That said, we really need to try and address the symptoms you've described:
> 
> 1. Switching from WiFi to 3g and back can trigger network connection 
> failures.
> 
> I'm currently working on a bug that involves the mobile data connection 
> dropping due to poor signal, or some sort of event that triggers 
> re-connection ( eg. setting the radio technology ).  I've verified that 
> there's a NM bug which prevents the connection from being re-established 
> for 5m in these cases:
> 
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1418077
> 
> This *could* exist in RTM, but we haven't managed to reproduce it there 
> yet.  That said, it doesn't really involve WiFi at all, so this may not 
> be what you're experiencing.
> 
> Jean-Baptiste reported a similar bug to yours which states that when he 
> goes out of range of his WiFi AP, the connection doesn't automatically 
> switch from WiFi to 3g:
> 
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1410113
> 
> Is this your scenario, or are you toggling WiFi on/off repeatedly and 
> seeing failures?  If it's the former, perhaps you can add your details 
> to the the Jean-Baptiste's bug?  If it's the latter, does it happen in 
> both directions ( ie. only when enabling WiFi, only when disabling WiFi, 
> or both )?
> 
> 2. When this happens, making phone calls fail as well.
> 
> This means the modem's in a bad state.  Does this always happen when you 
> lose your connection?  When this happens again, please run:
> 
> /usr/share/ofono/scripts/list-modems
> 
> We also have a great tool call network-test-session which is 
> super-useful for pin-poining networking issues:
> 
> https://github.com/sergiusens/network-test-session
> 
> Also when this happens can you grab a screenshot of the network 
> indicator?  Another good thing to check is the Cellular System 
> Settings... does it show your carrier?
> 
> > I just started to examine the logs and found something suspicious in
> > syslog. It seems that the device was stuck in a wakeup-suspend loop
> > for the whole night, producing dozens of messages in syslog every
> > second. Interestingly the battery still survived throughout the night.
> 
> I don't think this has anything to do with the networking issues you've 
> seen, but as it might be interesting to some of the folks on my team 
> looking at power consumption...
> 
> > I'm not too familiar with the kernel/networkmanager/powerd/ofono
> > things so I'm having a bit troubles to identify what's actually wrong
> > and for what component to report the bug.
> 
> network-manager is a good place to start for general networking issues:
> 
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+filebug
> 
> If you have an issue with telephony ( ie. not being able to make voice 
> calls ), then ofono is a better choice:
> 
> https://bugs.launchpad.net/ubuntu/+source/ofono/+filebug
> 
> Also, don't hestiate to ping me or Alfonso directly on IRC.
> 
> > Here's the syslog from last
> > night:
> >
> > http://notyetthere.org/data/syslog.wakeuploop
> >
> > Some more things I tried:
> > * enabling/disabling flight mode doesn't seem to help. The indicator
> > claims to reregister to GSM after I enter the SIM PIN, but still
> > doesn't fix the fact that phone calls can't be done or any data
> > connection fails.
> 
> The fact that you were prompted to enter your PIN means this isn't a 
> problem with FlightMode being cleared properly as ofono clearly 
> understood that your SIM was PIN-locked, and you were prompted.  That 
> said, there's a bug reported against unity8 where it appears that you've 
> unlocked your SIM, but in reality it's still locked.  You might want to 
> check the indicator again after unlocking and ensure that the SIM is 
> indeed unlocked:
> 
> https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1426876
> 
> > * rfkill looks ok (nothing blocked) afaict
> 
> Are you talking about the binary 'rfkill' command?  If so, please 
> realize that we use a daemon called urfkilld to monitor radio kill 
> switches.  This is because not all devices use the kernel rfkill 
> mechanism ( eg. ofono, WiFi on krillin, ... ).  We ship several scripts 
> that can be used to probe urfkill's state in /usr/share/urfkill/scripts. 
>   'enumerator' and 'flight-mode' are the two most useful.
> 
> > * the device seems to behave ok otherwise (no spinning processes and
> > the UI is smooth)
> > * The device is updated to the latest image (r21) but I noticed this
> > behaviour with the previous update already.
> > * I remember that I received a phone call yesterday evening. That was
> > working fine still. Next time I checked (some hours later),
> > connectivity was gone but I didn't have time to investigate yesterday
> > night.
> >
> > Anyone has an idea what this might be, or could tell me what component
> > I should file a bug for? I think I can reliably reproduce this when
> > not rebooting the phone for a couple of days and using it normally for
> > a while.
> 
> Please let me know if you still have questions.  Right now, trying to 
> isolate the exact scenario(s) is the most important piece of this.
> 
> Finally, in bugs you comment on and/or report, please indicate how many 
> SIMs you're using, whether any of them are unusual ( ie. MVNO SIMs ) 
> and/or PIN locked.
> 
> Regards,
> /tony
> 
> 
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I am also encountering some regressions in vivid devel-proposed on mako in terms of network connection.

1st. 3g connection is not available on startup i need to restart ofono on every boot to enable 3g 
https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1431026

2nd When i walk with my phone to work and when i arrive looking at the indicator network it still shows that i am connected to my home wifi. 

3rd I can have up to hundred + WIFI SSID to select from in the network indicator. I suppose those are cached and not deleted when they are not in range anymore. (link to 2nd problem)

Thibaut






-- 
Thibaut