935961 - [wasabi] When switch network type from CDMA to EVDO, 1x icon with no level signal bar will show for a while. (EVDO to CDMA has the same problem)

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: RIL, defect)

Description

[Enpei]

Attachment: Time stamp 11:14(CDMA > EVDO), 11:15(EVDO > CDMA)

When change network type form CDMA to EVDO, RSSI shows no signal bar with 1x next to it, which means 1x data call is connected but with no signal which is very strange behavior. Even EV is no connected yet, there should still have 1x signal, not completely no signal at all.

Gaia:     2db8490d5c1d7eeab8f7383042616a0391571501
Gecko:    8ba2d299b4b5da1c9290d8e0c4e8f47820c5cd1a
BuildID   20131107031537
Version   26.0

* Reproduce Steps
1. Set CDMA as network type.
2. Make sure 1x data call is established, and there is signal.
3. Change network type to EVDO.

* Expected Result
Before EV is connected, if 1x data call is still connected, there should have 1x icon next to signal bar with levels.

* Actual Result
RSSI change to 1x with no signal status right away.

* Occurrence rate
100%

Comment 1

[Enpei]

Earlier the day log has been sent to Edgar and there is first conclusion that modem report null signal which cause the problem, so label POVB for this bug first.

// switch to evdo only
11-07 11:13:56.323 I/Gecko   (  201): -*- RadioInterface[0]: 'ril.radio.preferredNetworkType' is now evdo
11-07 11:13:56.393 I/Gecko   (  201): -*- RadioInterface[0]: _preferredNetworkType is now evdo

// modem still report data call is established and the type is '1xrtt'
11-07 11:13:56.973 I/Gecko   (  674): -*- RILContentHelper: Received message 'RIL:DataInfoChanged': {"clientId":0,"data":{"connected":true,"emergencyCallsOnly":false,"roaming":false,"network":{"longName":null,"shortName":null,"mcc":null,"mnc":null},"cell":{"gsmLocationAreaCode":-1,"gsmCellId":-1},"type":"1xrtt","signalStrength":null,"relSignalStrength":null,"state":"registered","apn":"aptnet"}}

Comment 2

[Peipei Cheng (needinfo if you need my action)]

Attachment: qcril_adblogcat.log

QCRIL does not have this problem. Test build: 20131120031537

Please see attached adb logcat file.

Test start: 11-21 18:20:56.176

1. Automatic -> CDMA
   1X appears at 11-21 18:21:44.218 

2. CDMA->EVDO
   EV appears: 11-21 18:22:19.330

3. EVDO -> CDMA
   1X appears: 11-21 18:23:13.397

4. CDMA -> Automatic
   EV appears: 11-21 18:23:49.255

Comment 3

[Enpei]

Remove POVB from whiteboard since QCRIL has not such bug.

Comment 4

[Peipei Cheng (needinfo if you need my action)]

The behavior with QCRIL is:
1. Set CDMA as network type.
2. Make sure 1x data call is established, and there is signal.
3. Change network type to EVDO.

* Test Result
1x icon next to signal bar with levels become EV icon very quickly. And EV signal is used for data call.

Comment 5

[Ken Chang[:kenkai]]

Edgar, we should add have a solution here.thanks

Comment 6

[Edgar Chen [:edgar]]

Checking the log again (attachment 828624 [details]), 

// After switching preferred type.
11-07 11:13:56.393 I/Gecko   (  201): -*- RadioInterface[0]: _preferredNetworkType is now evdo

// Modem report invalid signal strength for a while.
11-07 11:13:56.963 I/Gecko   (  201): RIL Worker[0]: signal strength: {"gsmSignalStrength":0,"gsmBitErrorRate":0,"cdmaDBM":0,"cdmaECIO":0,"evdoDBM":0,"evdoECIO":0,"evdoSNR":0,"lteSignalStrength":0,"lteRSRP":0,"lteRSRQ":0,"lteRSSNR":0,"lteCQI":0}
11-07 11:13:57.624 I/Gecko   (  201): RIL Worker[0]: signal strength: {"gsmSignalStrength":0,"gsmBitErrorRate":0,"cdmaDBM":0,"cdmaECIO":0,"evdoDBM":0,"evdoECIO":0,"evdoSNR":0,"lteSignalStrength":0,"lteRSRP":0,"lteRSRQ":0,"lteRSSNR":0,"lteCQI":0}

// After a while, finally modem report correct signal information.
11-07 11:14:03.073 I/Gecko   (  201): RIL Worker[0]: $$signal strength: {"gsmSignalStrength":99,"gsmBitErrorRate":0,"cdmaDBM":-1,"cdmaECIO":-1,"evdoDBM":58,"evdoECIO":5,"evdoSNR":6,"lteSignalStrength":99,"lteRSRP":2147483647,"lteRSRQ":2147483647,"lteRSSNR":2147483647,"lteCQI":2147483647}

It seems modem's issue, I guess COMRIL did some workaround for this.

Comment 7

[Edgar Chen [:edgar]]

Hi Peipei,

Could you capture log again with radio log enabled by "adb logcat -v threadtime -b radio -b main" for both MOZ_RIL and COM_RIL? Maybe we can find some clues from them.

BTW, if you can test them side by side, it will be great.

Thank you

Comment 8

[Peipei Cheng (needinfo if you need my action)]

Attachment: COM_RIL.log

Sorry I could not reproduce them side by side since I only have one device for test.

CDMA -> EVDO : 12-05 11:27:33.613
EVDO -> CDMA : 12-05 11:29:00.058

Comment 9

[Peipei Cheng (needinfo if you need my action)]

Attachment: MOZ_RIL.log

CDMA -> EVDO: 12-05 11:39:35.457
EVDO -> CDMA: 12-05 11:40:12.586

Comment 10

[BMO Automation]

Firefox OS is not being worked on