ubuntu-phone team mailing list archive

[Dominik Wnęk <dominik@xxxxxxxx>]

W dniu 21.07.2015 o 20:07, Tony Espy pisze:
> On 07/21/2015 05:31 AM, Dominik Wnęk wrote:
> > Hi,
> >
> > I found a hotspot my Aquaris E5 (Ubuntu 15.04 (r3) - in other words,
> > OTA-4?), as well as my Ubuntu 14.04 computer, can't connect to. It's an
> > unencrypted g hotspot at a hotel. Everything else connects (OS X on the
> > same computer, iPhone, Android phone, PS Vita, you name it).
> >
> > It's really annoying, especially as I'd been really looking forward to
> > playing around with OTA-5 this week on my holiday. :-(
> >
> > I have until this Sat to debug it, as that's when I'll be leaving. Do
> > you guys think we can make Ubuntu better in that time? :-)
>
> Sure...
>
> How is the signal strength of the hotspot?  Have you tried to see 
> whether location effects your ability to connect?
Thanks for answering.

The MBP I'm sitting at tells me the signal strength is RSSI -62 dBm and 
Noise is -92 dBm. iwconfig on the phone (associated but without a 
functioning connection) tells me Link Quality 0/100 Signal level:-67 dBm 
Noise level:0 dBm

I don't know where the hotspot is, but since every other device I own 
connects and transmits fine from the spot I'm sitting at, I'd say it's a 
problem with the phone, not my location. Since the computer connects 
fine as well running OS X, but not when running Ubuntu 14.04, I'd say 
the software is the culprit.
> > It's hard to get info off the phone without internet, so here's _some_
> > of what syslog grepped with NetworkManager spits out:
> >
> > Activation (wlan0) Stage 1 of 5 (Device Prepare) complete
> > Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
> > Config: set interface ap_scan to 1
> > (wlan0): supplicant interface state: inactive -> associating
> > (wlan0): supplicant interface state: associating -> completed
> > Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.
> > Connected to wireless network 'wireless TV'.
> > Activation Stage 3 of 5 scheduled and then started...
> > (wlan0): device state change: config -> ip-config (reason 'none') [50 
> > 70 0]
> > Activation (wlan0) Beginning DHCPv4 transaction (timeout in 45 seconds)
> > dhclient started with pid ...
> > Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
> > DHCPv4 state changed nbi -> preinit
> > <warn> (wlan0) DHCPv4 request timed out.
> > (wlan0) canceled DHCP transaction, DHCP client pid ...
> > Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) cheduled...
> > started... complete.
> > (wlan0): supplicant interface state: completed -> disconnected
> > (wlan0): supplicant interface state: disconnected -> scanning
> > (wlan0): supplicant interface state: scanning -> associating
> > (wlan0): supplicant interface state: associating -> completed
> > (5 minutes later)
> > (wlan0): supplicant interface state: completed -> disconnected
> > (wlan0): supplicant interface state: disconnected -> scanning
> > (wlan0): supplicant interface state: scanning -> associating
> > (wlan0): supplicant interface state: associating -> completed
> > (etc)
> >
> > Desktop Ubuntu does a similar thing: sending out DHCP requests and
> > seemingly never receiving a response.
> >
> > Any ideas how to debug this in more detail?
>
> You can enable verbose debug logs in NM with the following command-line:
>
> sudo nmcli general logging level debug domains wifi
>
> To disable verbose logs, use:
>
> sudo nmcli general logging level info domains DEFAULT
>
> I'd also suggest reporting a NM bug and getting the requisite 
> information ( ie. syslog, output of 'system-image-cli -i', ... ) in 
> the bug vs. trying to do so in this email thread.
>
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+filebug
>
> Regards,
> /tony
I enabled the verbose log, but at first glance I'm not seeing anything 
particularly revealing. I'll report later, once I've managed to get text 
off the phone without any internet connection.

Cheers,

--
Dominik