828089 - [B2G][Settings][Cellular & Data][Network Operator] Unable to disconnect from existing network operator and connect to a new one

Status: RESOLVED FIXED

(Core :: DOM: Device Interfaces, defect)

Description

[Nick Davidson]

Attachment: connection to other carrier failed.

This is repro on Test Run 2 Unagi Build 20130104070203

 Related to CASE #3540

Description: As a user I want the phone to disconnect from an existing Network operator when the phone connects to a new network so that I am connected to one network at a time.

Prerequisites: Automatic Selection is off. there are at least two available network operators to which to connect; phone is connected to the first one in the list.


Repro Steps: 
1. Go to Settings> Cellular and Data Settings > Network Operator
2. Turn Automatic Selection OFF, wait for the list of networks to show up
   First network operator on a list saying AT&T "Current" and second one T-Mobile - "Available"
4. Tap on a second ("Available") network operator (in this case T-Mobile)

Actual Results:
Trying to connect for several seconds then status line under network name saying "Connection failed"

Expected Results:
 Phone connects to the second network in the list, which then moves to the top. User is able browse to a web page to test if connection works.

Notes:
-Repro'd 4/4 Times on multiple devices
-See attached screenshot for more info
Issue might be also with first carrier at&t - which might not allow connection to other carrier if at&t coverage is present.

Comment 1

[Shian-Yow Wu [:swu]]

Attachment: RIL failure log

Comment 2

[Shian-Yow Wu [:swu]]

Attachment: RIL

Comment 3

[Shian-Yow Wu [:swu]]

Attachment: RIL failure log (radio)

logcat -b radio shows "Generic Failure".

D/RILC    (  111): UI --- RIL_REQUEST_SET_NETWORK_SELECTION_MANUAL (47) ---> RIL [RID 0, token id 120, data len 4]
D/RILC    (  111): RID 0 corresponds to as_id 0
D/RILC    (  111): Manual network selection : 2622
D/RILC    (  111): RID 0 ph srv 3GPP(1): modem id=0, ma=Multimode(0), net_pref=GSM WCDMA preferred(0)
D/RILC    (  111): UI <--- RIL_REQUEST_SET_NETWORK_SELECTION_MANUAL (47) Complete --- RIL [RID 0, Token 120, Generic Failure, Len 0 ]

Comment 4

[Shian-Yow Wu [:swu]]

Attachment: V1

This is the MNC format issue, the MNC must be at least two digits.
Currently all operators with MNC starting with '0' will hit this bug.

This patch fixed the issue by appending '0' on MNC when there's only 1 digit.

Comment 5

[Shian-Yow Wu [:swu]]

Attachment: V2

The current MCC/MNC value are stored as integer.  For operator, it's use exact string for matching, so it will cause problems when if MNC value starts with '0'.

Fix this bug by appending '0' on MNC, and a follow up bug 828307 was created to store MCC/MNC by string.

Comment 6

[Vicamo Yang [:vicamo][:vyang]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/177cce1bbb3f

Comment 7

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

Comment on attachment 699788 [details] [diff] [review]
V2

[Triage Comment]
Feel free to land this though.

Comment 8

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

Not blocking since this is a problem in the RIL that we're not shipping.

Comment 9

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/177cce1bbb3f

Comment 10

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-b2g18/rev/d709345fccee

Comment 11

[amiller]

UCID: set-035
https://moztrap.mozilla.org/results/case/62558/

Comment 12

[Nick Davidson]

Attachment: T-mobile Sim - network-operator test

Issue still reproduces on Unagi Kernal from Dec 5  Build 20130116070204 

Repro Steps: 
1. Insert at&t sim in a device
2. Go to Settings> Cellular and Data Settings > Network Operator
3. Turn Automatic Selection OFF, wait for the list of networks to show up
   First network operator on a list saying AT&T "Current" and second one T-Mobile - "Available"
4. Tap on a second ("Available") network operator (in this case T-Mobile)

--==This was also reproduced with a T-mobile SIM card==--

1. Insert T-Mobile SIM card in a device
2. Go to Settings> Cellular and Data Settings > Network Operator
3. Turn Automatic Selection OFF, wait for the list of networks to show up
   First network operator on a list saying T-Mobile "Current" and second one at&t - "Available"
4. Tap on a second ("Available") network operator (in this case at&t)

Actual Results (in both situations):
Trying to connect for several seconds with status line under network name saying "connecting" and than status line under network name changes to "Connection failed"

Comment 13

[Shian-Yow Wu [:swu]]

It would be great to have RIL log(logcat and logcat -b radio) for analysis.  Thanks!

To enable RIL log:
$ adb pull /system/b2g/defaults/pref/user.js
$ sed -i 's/pref("ril.debugging.enabled", false);/pref("ril.debugging.enabled", true);/g' user.js
$ adb remount
$ adb push user.js /system/b2g/defaults/pref/user.js
$ adb shell stop b2g
$ adb shell start b2g

Comment 14

[Nick Davidson]

I found file and was able to modify it in text editor  -->>pref("ril.debugging.enabled", true);  and save it 

when I tried to push file to device getting following errors: 

[2013-01-17 09:32:08 - ddms] transfer error: Read-only file system
[2013-01-17 09:32:08] Failed to push selection: Read-only file system

do you know ow to fix that?

(In reply to Shian-Yow Wu from comment #13)
> It would be great to have RIL log(logcat and logcat -b radio) for analysis. 
> Thanks!
> 
> To enable RIL log:
> $ adb pull /system/b2g/defaults/pref/user.js
> $ sed -i 's/pref("ril.debugging.enabled",
> false);/pref("ril.debugging.enabled", true);/g' user.js
> $ adb remount
> $ adb push user.js /system/b2g/defaults/pref/user.js
> $ adb shell stop b2g
> $ adb shell start b2g

Comment 15

[Shian-Yow Wu [:swu]]

(In reply to Nick Dee from comment #14)
> I found file and was able to modify it in text editor 
> -->>pref("ril.debugging.enabled", true);  and save it 
> 
> when I tried to push file to device getting following errors: 
> 
> [2013-01-17 09:32:08 - ddms] transfer error: Read-only file system
> [2013-01-17 09:32:08] Failed to push selection: Read-only file system
> 
> do you know ow to fix that?
> 

The /system partition is read-only, before pushing, please change it to read-write first by "adb remount".

After that, you need to restart b2g (or reboot phone) to capture the RIL log.

Comment 16

[Nick Davidson]

Attachment: RIL log capture with at&t SIM card trying to connect to t-mobile network

repro steps in comment 12

Comment 17

[Nick Davidson]

Attachment: RIL log capture with T-Mobile SIM trying to connect to AT&T network

repro steps described in comment 12. Please let me know if log has required  information

Comment 18

[Nick Davidson]

New Bug 834973 Is open on this issue since it is still repro on Unagi Kernal Dec 5
 Build 20130125070201 RIL logs will be attached to new bug.